Homework Answers
Add Answer to:
D Question 4 2 pts If a reaction evolves 664.74-J of heat as 0.015-moles of water...
Exit Question 2 1 pts 4 Consider the balanced reaction 3 A +6 B C +5...
Exit Question 2 1 pts 4 Consider the balanced reaction 3 A +6 B C +5 D and the enthalpies of formation provided in the table below. ΔΗ, Compound (kJ/mol) 314.5 - 166.5 -81.3 Suppose that the AH of the overall reaction is 250.2 kJ/molrxn. Calculate the value of the AH of B in kJ/mol. Report your answer to three decimal places (ignore significant figures). 9:32 Exit Question 3 1 pts 6 Consider the balanced reaction 8 A+ 5 B...
5. Question 2 1 pts Suppose you are investigating the reaction: M(s) + 2 HCl(aq) →...
5.
Question 2 1 pts Suppose you are investigating the reaction: M(s) + 2 HCl(aq) → MCl2(aq) + H2(g). You weigh out a 0.202 gram piece of metal and combine it with 62.2 mL of 1.00 M HCl in a coffee-cup calorimeter. If the molar mass of the metal is 48.51 g/mol, and you measure that the reaction absorbed 111 J of heat, what is the enthalpy of this reaction in kJ per mole of limiting reactant? Enter your answer...
QUESTION 1 Heat is required to dissolve NaOH(s) in water. A-True B-False -------------------- QUESTiON 2 The...
QUESTION 1 Heat is required to dissolve NaOH(s) in water. A-True B-False -------------------- QUESTiON 2 The below equation represents an exothermic reaction: Reactants + delta H ----> product ATrue B-False -------------------- QUESTION 3 The Styrofoam cup was used as an insulated device that allows heat loss A-True B-False -------------------- QUESTION 4 The following is an endothermic reaction; NaOH+ HCI------> NaCl+H2O+42.12KJ A-True B-False -------------------- QUESTION 5 NaOH(s)---> Na^+(aq)+CH^-(aq)+44.02kJ Calculate the amount (in moles) of NaOH needed to make the reaction above...
Question 8 1 pts A particular reaction has AH = -104 kJ and AS = -137...
Question 8 1 pts A particular reaction has AH = -104 kJ and AS = -137 J/K. At 25°C, what is the minimum amount of heat that is lost to the surroundings when this reaction occurs? Enter your answer to 0 decimal places and in units of kJ. Do not include a positive or negative sign in your answer.
Question 21 4 pts Consider the following reaction: 2 Mg + O2 → 2 MgO AH...
Question 21 4 pts Consider the following reaction: 2 Mg + O2 → 2 MgO AH rxn=-1203 kJ Calculate the amount of heat (in kJ) associated with complete reaction of 4 moles of Mg. 0-2406 kJ 0-601.5 kJ O-1203 kJ O-4812 kJ none of the above
D Question 4 3 pts Part 2, find AHºrxn=kJ/mol Two solutions are mixed in a coffee...
D Question 4 3 pts Part 2, find AHºrxn=kJ/mol Two solutions are mixed in a coffee cup calorimeter both are initially at 22.60°C. When a 100.0 mL volume of 1.00 M AgNO3 solution is mixed with a 100.0 mL sample of 0.500 M NaCl solution, the temperature in the calorimeter rises to 28.30°C (assume no heat is lost to the surroundings and the density and heat capacity of the solutions is the same as that of water). Determine the AH°rxn...
How much heat required to convert 36 grams (2 moles) of liquid water at 4.0 oC...
How much heat required to convert 36 grams (2 moles) of liquid water at 4.0 oC to liquid water at 50 oC? The delta-H of fusion for H2O is 6.02 kJ/mol and the heat capacity of liquid water is 4.18 J/goC A) 36 kJ B) 12.04 kJ C) 8.36 kJ D) 4.18 kJ E) 6.9 kJ
1 mol 1. Using dimensional analysis, calculate the number of moles of NaOH (nou) used in...
1 mol 1. Using dimensional analysis, calculate the number of moles of NaOH (nou) used in reaction #1 (show your work): NaOH (mol) = mnao (9) Where non is MM NaOH (9) the number of moles NaOH, mNaOH is the mass of sodium hydroxide used, and MMNOH is the molar mass of sodium hydroxide. 2. Using the density of water (d != 1.000.), calculate the mass of the 50.0 g water used in reaction #1 using: mwater = Vwater X...
Question 4 1 pts Calculate ASºsys for this reaction at 25°C. Input final answer in units...
Question 4 1 pts Calculate ASºsys for this reaction at 25°C. Input final answer in units of J/K and to 1 decimal place. N2(g) + 3 H2(g) → 2 NH3(g) Species Sº (J/mol K) AH°F (kJ/mol) N2(g) 191.5 o H2(g) 130.6 NH3(g) 192.8 -45.92
Question Not yet answered A reaction at 4.21 atm produces 24.6 L of a gas and...
Question Not yet answered A reaction at 4.21 atm produces 24.6 L of a gas and evolves 69.7 kJ of heat (exothermic). Calculate the change in internal energy of the system (in kJ). Marked out of 1.00 Answer: Flag question Question 8 Not yet answered Marked out of 1.00 1.495 g of an unknown hydrocarbon (108.1 g/mol) burns in bomb calorimeter in excess oxygen. The heat capacity of the calorimeter,cy, = 5.294 kJ/°C and AT -6.744 °C. Find AE for...
Exit Question 2 1 pts 4 Consider the balanced reaction 3 A +6 B C +5 D and the enthalpies of formation provided in the table below. ΔΗ, Compound (kJ/mol) 314.5 - 166.5 -81.3 Suppose that the AH of the overall reaction is 250.2 kJ/molrxn. Calculate the value of the AH of B in kJ/mol. Report your answer to three decimal places (ignore significant figures). 9:32 Exit Question 3 1 pts 6 Consider the balanced reaction 8 A+ 5 B...
5.
Question 2 1 pts Suppose you are investigating the reaction: M(s) + 2 HCl(aq) → MCl2(aq) + H2(g). You weigh out a 0.202 gram piece of metal and combine it with 62.2 mL of 1.00 M HCl in a coffee-cup calorimeter. If the molar mass of the metal is 48.51 g/mol, and you measure that the reaction absorbed 111 J of heat, what is the enthalpy of this reaction in kJ per mole of limiting reactant? Enter your answer...
Question 8 1 pts A particular reaction has AH = -104 kJ and AS = -137 J/K. At 25°C, what is the minimum amount of heat that is lost to the surroundings when this reaction occurs? Enter your answer to 0 decimal places and in units of kJ. Do not include a positive or negative sign in your answer.
Question 21 4 pts Consider the following reaction: 2 Mg + O2 → 2 MgO AH rxn=-1203 kJ Calculate the amount of heat (in kJ) associated with complete reaction of 4 moles of Mg. 0-2406 kJ 0-601.5 kJ O-1203 kJ O-4812 kJ none of the above
D Question 4 3 pts Part 2, find AHºrxn=kJ/mol Two solutions are mixed in a coffee cup calorimeter both are initially at 22.60°C. When a 100.0 mL volume of 1.00 M AgNO3 solution is mixed with a 100.0 mL sample of 0.500 M NaCl solution, the temperature in the calorimeter rises to 28.30°C (assume no heat is lost to the surroundings and the density and heat capacity of the solutions is the same as that of water). Determine the AH°rxn...
1 mol 1. Using dimensional analysis, calculate the number of moles of NaOH (nou) used in reaction #1 (show your work): NaOH (mol) = mnao (9) Where non is MM NaOH (9) the number of moles NaOH, mNaOH is the mass of sodium hydroxide used, and MMNOH is the molar mass of sodium hydroxide. 2. Using the density of water (d != 1.000.), calculate the mass of the 50.0 g water used in reaction #1 using: mwater = Vwater X...
Question 4 1 pts Calculate ASºsys for this reaction at 25°C. Input final answer in units of J/K and to 1 decimal place. N2(g) + 3 H2(g) → 2 NH3(g) Species Sº (J/mol K) AH°F (kJ/mol) N2(g) 191.5 o H2(g) 130.6 NH3(g) 192.8 -45.92
Question Not yet answered A reaction at 4.21 atm produces 24.6 L of a gas and evolves 69.7 kJ of heat (exothermic). Calculate the change in internal energy of the system (in kJ). Marked out of 1.00 Answer: Flag question Question 8 Not yet answered Marked out of 1.00 1.495 g of an unknown hydrocarbon (108.1 g/mol) burns in bomb calorimeter in excess oxygen. The heat capacity of the calorimeter,cy, = 5.294 kJ/°C and AT -6.744 °C. Find AE for...
Most questions answered within 3 hours.
-
The x component of the velocity of an object vibrating
along the x-axis obeys the equation...
asked 18 minutes ago -
A junction box contains two trade size 2 raceways on the left
side, and two trade...
asked 51 minutes ago -
Atmospheric Mass
Venus and Earth have about the same mass and radius, but the
atmospheric pressure...
asked 1 hour ago -
5. Discuss the use of fault tree analysis (FTA) for risk
assessment (maximum one paragraph).
asked 2 hours ago -
Given that a sample of aluminium oxide has a Young's modulus of
393 GPa and a...
asked 4 hours ago -
At a certain temperature, the equilibrium constant, Kc, for this
reaction is 53.3.
H2(g)+I2(g)−⇀↽−2HI(g)Kc=53.3
At this...
asked 5 hours ago -
Question1 ) The STL provides similiar classes called stack and
queue, both of which gave functions...
asked 6 hours ago -
For Questions 1-4, assume you have 5 bits available:
1. For (positive) integers: What is the...
asked 6 hours ago -
convert grams into vloume with the density of water being at
.997514 g/cm^3 at 23.1 Celsuis...
asked 8 hours ago -
Foreman company obtained a $20,000, 6% loan on May 1, 2018.
Principal and interest will be...
asked 8 hours ago -
5. Problem 11.05 (Discounted Payback)
eBook
Project L costs $60,000, its expected cash inflows are $14,000
per...
asked 9 hours ago -
1. Which of the following is true about politics and health
organizations?
A. Health organizations are...
asked 9 hours ago