a. You perform a coffee cup calorimetry experiment to determine the enthalpy change for the dissolution...
a. You perform a coffee cup calorimetry experiment to determine the enthalpy change for the dissolution of sodium chloride in water. You add 10g of NaCl to 100 ml of water at 20.00 degrees C and mix well. The final temperature is 19.80 degrees celsius which of the following statements is true.
-energy moves from the surroundings to the system due to the endothermic reaction
-energy moves from the system to the surroundings due to the endothermic reaction
-energy moves from the system to the surroundings due to the exothermic reaction
-energy moves from the surroundings to the system due to the exothermic reaction.
b.which of these substances would you expect to have the highest value of entropy?
CO (g) F2(g) CCl4(g)
c. Given 2 A---> B; delta H= +61 kJ
What is the delta H for the reaction 1/2 B---> A
Answer in kJ
Please answer completely will give thumbs up! THANK YOU! and answer quickly please
Homework Answers
Answer: energy moves from the surroundings to the system due to the endothermic reaction
when NaCl dissolves in wate, absorbs heat from the surrounding .
as temperature decrease from 20 0C to 18 0C we can understand that this process requires heat. so required heat is absorbed from the surrounding.
This is endothermic process. Heat flows from outside to inside.
[pls post one question in one post]
Add Answer to:
a. You perform a coffee cup calorimetry experiment to determine
the enthalpy change for the dissolution...
Coffee Cup Calorimetry: Solution Enthalpy When a solid dissolves in water, the solution may become hotter...
Coffee Cup Calorimetry: Solution Enthalpy
When a solid dissolves in water, the solution may become hotter or colder. The dissolution enthalpy (dissolving) can be determined using a coffee cup calorimeter. Thermometer In the laboratory a general chemistry student finds that when 1.46 g CaCl(s) is dissolved in 113.70 g water, the temperature of the solution increases from 22.49 to 24.83 °C. Cardboard or Styrofoam lid The heat capacity of the calorimeter (sometimes referred to as the calorimeter constant) was determined...
Coffee Cup Calorimetry Part A Calorimetry is a method used to measure enthalpy, or heat, changes...
Coffee Cup Calorimetry Part A Calorimetry is a method used to measure enthalpy, or heat, changes that occur during chemical processes. Two common calorimeters are constant-pressure calorimeters and constant- valume (or 'bomb) calorimeters. Bomb calorimeters are used to measure combustion and other gas-producing reactions, where the reaction is observed in a strong, sealed vessel. A simple constant-pressure calorimeter can be made from a foam coffee cup and a thermometer; energy changes in a reaction are observed via a temperature change...
Calculate the enthalpy change
Calculate the enthalpy change, delta H , for the process in which 44.4g of water is converted from liquid at 13.4 degrees celsius to vapor at 25.0 degreescelsius.For water, delta H = 44.0 kJ/mol at 25.0 degrees Celsius and s = 4.18J/(g*C) for H2O
calorimetry experiment Guidelines for Discussion: Answer the following questions, as per your experimental observations. 1. What...
calorimetry experiment
Guidelines for Discussion: Answer the following questions, as per your experimental observations. 1. What happens if initial temperature is not recorded in each experiment? 2. What happens if the calorimeter is not covered properly? 3. How will you get the final temperature? 4. What are the techniques used in this experiment? 5. Comment on possible accuracy of your results Guidelines for Conclusion: 1. What is your result considering the objective (s) of the experiment? 2. What did you...
1. Calculate the change in the internal energy of the following systems and then determine whether...
1. Calculate the change in the internal energy of the following systems and then determine whether the processes are endothermic or exothermic: (a) 45 kJ of heat is transferred from the system to the surroundings. Answer: AE- the process is (b) 605 J of work is performed by the surroundings to the system. Answer: AE (c) When 145 J of work is done by the surroundings to the system, 212 J of heat is transferred from the system to the...
<HW CH 5B Coffee Cup Calorimetry < 1 of 7 > Review Constants Periodic Table Calorimetry...
<HW CH 5B Coffee Cup Calorimetry < 1 of 7 > Review Constants Periodic Table Calorimetry is a method used to measure enthalpy, or heat, changes that occur during chemical processes. Two common calorimeters are constant- pressure calorimeters and constant volume (or "bomb") calorimeters. Part A A total of 2.00 mol of a compound is allowed to react with water in a foam coffee cup and the reaction produces 186 g of solution. The reaction caused the temperature of the...
Bomb calorimetry is a technique used to determine the enthalpy of combustion, usually in O2, of...
Bomb calorimetry is a technique used to determine the enthalpy of combustion, usually in O2, of a chemical species. A known amount of compound is placed inside a fixed volume container that is, in turn, filled with oxygen at a high enough pressure to ensure complete combustion. The fixed-volume container (the 'bomb') is then inserted into a bucket containing a precisely known volume of water. The oxygen and compound are ignited, and the temperature change in the water is recorded....
1. A coffee cup calorimeter was used for the neutralization reaction of 100 mL of 1.00...
1. A coffee cup calorimeter was used for the neutralization reaction of 100 mL of 1.00 M hydrochloric acid with 100 mL of 1.20 M sodium hydroxide. The initial temperature was 22.88 °C and the final temperature was 29.39 °C. Calculate the calorimeter constant for the reaction. HCl (aq) + NaOH (aq) NaCl (aq) + H2O (∆H°rxn = -58.3 kJ/mol) 2. The same calorimeter was used for the dissolution of 8.86 g sample of lithium chloride in 100.0 mL of...
a) Use Hess's law to calculate the enthalpy change for the reaction: 3C(s) + 4H2(g) +...
a) Use Hess's law to calculate the enthalpy change for the reaction: 3C(s) + 4H2(g) + ½O2(g) → C3H8O(l) Given the following thermochemical equations: 2C3H8O(l) + 9O2(g) → 6CO2(g) + 8H2O(l) ΔH = -4042.6 kJ/mol C(s) + O2(g) → CO2(g) ΔH = -393.51 kJ/mol H2(g) + ½O2(g) → H2O(l) ΔH = -285.83 kJ/mol (in kJ/mol) A: -267.7 B: -302.6 C: -341.9 D: -386.3 E: -436.5 F: -493.3 G: -557.4 H: -629.9 b) Define if the following statement is an endothermic process or exothermic...
A chemist measures the energy change Delta H during the following reaction: 2H_2I(l) rightarrow 2H_2(g) +...
A chemist measures the energy change Delta H during the following reaction: 2H_2I(l) rightarrow 2H_2(g) + O_2(g) Delta H = 572. kJ Use the information to answer the following questions. This reaction is ... exothermic endothermic Suppose 94.8 g of H_2O react. Will any heat be released or absorbed? Yes, absorbed Yes, released No If you said heat will be released or absorbed in the second part of this question, calculate how much heat will be released or absorbed. Round...
Coffee Cup Calorimetry: Solution Enthalpy
When a solid dissolves in water, the solution may become hotter or colder. The dissolution enthalpy (dissolving) can be determined using a coffee cup calorimeter. Thermometer In the laboratory a general chemistry student finds that when 1.46 g CaCl(s) is dissolved in 113.70 g water, the temperature of the solution increases from 22.49 to 24.83 °C. Cardboard or Styrofoam lid The heat capacity of the calorimeter (sometimes referred to as the calorimeter constant) was determined...
Coffee Cup Calorimetry Part A Calorimetry is a method used to measure enthalpy, or heat, changes that occur during chemical processes. Two common calorimeters are constant-pressure calorimeters and constant- valume (or 'bomb) calorimeters. Bomb calorimeters are used to measure combustion and other gas-producing reactions, where the reaction is observed in a strong, sealed vessel. A simple constant-pressure calorimeter can be made from a foam coffee cup and a thermometer; energy changes in a reaction are observed via a temperature change...
calorimetry experiment
Guidelines for Discussion: Answer the following questions, as per your experimental observations. 1. What happens if initial temperature is not recorded in each experiment? 2. What happens if the calorimeter is not covered properly? 3. How will you get the final temperature? 4. What are the techniques used in this experiment? 5. Comment on possible accuracy of your results Guidelines for Conclusion: 1. What is your result considering the objective (s) of the experiment? 2. What did you...
1. Calculate the change in the internal energy of the following systems and then determine whether the processes are endothermic or exothermic: (a) 45 kJ of heat is transferred from the system to the surroundings. Answer: AE- the process is (b) 605 J of work is performed by the surroundings to the system. Answer: AE (c) When 145 J of work is done by the surroundings to the system, 212 J of heat is transferred from the system to the...
<HW CH 5B Coffee Cup Calorimetry < 1 of 7 > Review Constants Periodic Table Calorimetry is a method used to measure enthalpy, or heat, changes that occur during chemical processes. Two common calorimeters are constant- pressure calorimeters and constant volume (or "bomb") calorimeters. Part A A total of 2.00 mol of a compound is allowed to react with water in a foam coffee cup and the reaction produces 186 g of solution. The reaction caused the temperature of the...
Bomb calorimetry is a technique used to determine the enthalpy of combustion, usually in O2, of a chemical species. A known amount of compound is placed inside a fixed volume container that is, in turn, filled with oxygen at a high enough pressure to ensure complete combustion. The fixed-volume container (the 'bomb') is then inserted into a bucket containing a precisely known volume of water. The oxygen and compound are ignited, and the temperature change in the water is recorded....
A chemist measures the energy change Delta H during the following reaction: 2H_2I(l) rightarrow 2H_2(g) + O_2(g) Delta H = 572. kJ Use the information to answer the following questions. This reaction is ... exothermic endothermic Suppose 94.8 g of H_2O react. Will any heat be released or absorbed? Yes, absorbed Yes, released No If you said heat will be released or absorbed in the second part of this question, calculate how much heat will be released or absorbed. Round...
Most questions answered within 3 hours.
-
Learning aquatic zumba is an example of tacit knowledge. true or
false
asked 22 minutes ago -
Journalize the entries to record the following (refer to the
Chart of Accounts for exact wording...
asked 5 minutes ago -
An electron moves at 2.60×106 m/s through a region in
which there is a magnetic field...
asked 2 minutes ago -
An AC generator supplies an rms voltage of 240 V at 50.0 Hz. It
is connected...
asked 4 minutes ago -
China’s income per capital maintained an 8% rate of growth in
recent decades. As a result,...
asked 8 minutes ago -
What steps would you take to institutionalize the controls you’d
select for your organization? Where do...
asked 22 minutes ago -
Table salt contains 39.33 g of sodium per 100 g of salt. The
U.S. Food and...
asked 39 minutes ago -
C&A records the following profit figures for the last six
months in Excel for a linear...
asked 36 minutes ago -
This needs to be done in c++11 and be compatible with g++
compiling
Project description:
Write...
asked 38 minutes ago -
.
NEED ANSWER ASAP
******NEW ANSWER NEVER USED BEFORE****
Write a page paper on conducting marketing...
asked 39 minutes ago -
Assume that capital markets are competitive and that the
international Fisher hypothesis holds. The one-year interest...
asked 1 hour ago -
Solid potassium phosphate is slowly added to 150 mL of a 0.0518
M calcium nitrate solution....
asked 1 hour ago