What equation would you use to calculate the heat required to raise the MgCl2 solution to...
What equation would you use to calculate the heat required to raise the MgCl2 solution to the maximum temperature? (HINT: It may be useful to use a dimensional-analysis approach.) I was told the equation is (Delta H)=mc(Delta T) but the mass needs to change. What would the mass need to be?
Homework Answers
The heat needed to increase the temperature of a substance by a
value of 
T, is given by:
Heat = mass * Specific Heat of the substance *
T
If your mass value is wrong, it might be becvause you've neglected the mass of solute added to the solution and only considered the mass of water you've used
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What equation would you use to calculate the heat required to
raise the MgCl2 solution to...
1) The heat of solution (delta H) For sodium hydroxide is -44.5 kJ/mol calculate the amount...
1) The heat of solution (delta H) For sodium hydroxide is
-44.5 kJ/mol calculate the amount of energy involved when 5.0 g
sodium hydroxide is dissolved in water
2) calculate the change in temperature expected when 5.0 g
sodium hydroxide is dissolved in 50.0 g water using the energy
(Joules) calculated above. (Ccal= 4.5J/g°C, include 4.0g magnetic
stir-bar in the total mass)
Prelab Exercise: The Heat of solution (H) for sodium hydroxide is -44.5 kJ/mol. Calculate the amount of energy...
Question 14 of 39 > How much heat is required to raise the temperature of 26.2...
Question 14 of 39 > How much heat is required to raise the temperature of 26.2 g of water from -35 "C to 155 "C? heat: about Careers vacy policy 11:24 SAMSUNG Hint Check Answer < Question 15 of 39 > If 205 cal are added to 28.2 g of solid iron, what is the change in temperature of the iron? The specific heat of iron is 0.11-c. about us career placy policy masec 11:24 SAMSUNG 0 0 0 Question...
What amount of heat would be required to raise the temperature of 75.00g of tungsten from...
What amount of heat would be required to raise the temperature of 75.00g of tungsten from an initial temp of 20.00C to 85.00C? The specific heat of tungsten is 0.132 J/gC. I did: (75.00g)(0.132J/gc)(85-20) and got 643.5J it was incorrect and I dont understand why
I need help compliting A&B, if you can show how you got it that'll be great!...
I need help compliting A&B, if you can show how you got it
that'll be great! thanks!
Section Code wala Sheet Table 11.1. Time-temperature data. A. Volume of HCl solution (m) Molarity of HCl solution (M) Volume of NOH solution (m) Molarity of NOHution M Initial temperature of HCl solution (C) Initial temperature of NaOH solution (C) Temperatures of solution ) 0.25 min 0.15 0.50 Run Run 2 49.5 49.8 2.119 2.119 53.2 53.6 2.087 2.087 18.9°C 18.8°C 19.0c 180C...
I need the solution for the volume of HCl. Heat of Reaction for the Combustion of...
I need the solution for the volume of HCl.
Heat of Reaction for the Combustion of Magnesium Although you will not be working with actual chemicals during this laboratory, since you will be doing it virtually, the procedure is given in order for you to be aware of the process that would be followed in a laboratory setting. Introduction In this experiment, you will use Hess's Law to determine the heat for a reaction that is difficult to measure directly....
1. What would happen to each concentration unit (% mass/mass, M, and m) if you raise...
1. What would happen to each concentration unit (% mass/mass, M, and m) if you raise the temperature in the room? No change, increase, or decrease? Why?
Lab 14 Heat of Reaction Objective: To experimentally determine the heat of reaction for two exothermic...
Lab 14 Heat of Reaction Objective: To experimentally determine the heat of reaction for two exothermic reactions. Consider the following equations. (1) Mg(s) + 2HCI → MgCl2(aq) + H2(g) Hz(8) AH = ? (2) MgO(s) + 2HCl(aq) → MgCl(aq) + HOH (1) AH2 = ? The reactions represented by equations (1) and (2) will be our experimental work for today. Background: The heat given off or gained in a reaction is commonly called the heat of reaction. A reaction that...
would you do all the questions please 56) How much heat energy is required to raise...
would you do all the questions please
56) How much heat energy is required to raise the temperature of 0.298 mole of water from 35.93°C to 79.84" C? The specific heat capacity of water = 4.18 J/g"C A) 13.1 B) 54.7 J C) 985 J D) 2105 J E) 3310J 57) A 43.9-g piece of copper (Ccu= 0.385 J/g*C) at 135.0 C is plunged into 254 g ofwater at 39.0°C. Assuming that no heat is lost to the surroundings, what...
I need help understanding which heat equation and which specific heat I need to use in...
I need help understanding which heat equation and which specific
heat I need to use in this situation. I know we can have specific
heat per mol and per kg.
02 Two insulated cylinders Aand B with volumes VA 28 m3 and V8 5.0 m3 contain chlorine gas at different pressures and temperatures. The cylinders are insulated (no heat is lost to or gained from the outside) and connected by a valve. Initially, the valve is closed and the...
3. Here we use 4.184 for our calorimetry constant, since that is how much energy it...
3. Here we use 4.184 for our calorimetry constant, since that is how much energy it takes to raise 1 gram of water by 1 degree Celsius. But what if we did not know that? How could I calibrate our calorimeter to find this value? -10 points 4. What are 2 sources of error for this experiment (you cannot simply say human error)? how would the error effect the measurement? - 10 points 5. How much energy would be transferred...
1) The heat of solution (delta H) For sodium hydroxide is
-44.5 kJ/mol calculate the amount of energy involved when 5.0 g
sodium hydroxide is dissolved in water
2) calculate the change in temperature expected when 5.0 g
sodium hydroxide is dissolved in 50.0 g water using the energy
(Joules) calculated above. (Ccal= 4.5J/g°C, include 4.0g magnetic
stir-bar in the total mass)
Prelab Exercise: The Heat of solution (H) for sodium hydroxide is -44.5 kJ/mol. Calculate the amount of energy...
Question 14 of 39 > How much heat is required to raise the temperature of 26.2 g of water from -35 "C to 155 "C? heat: about Careers vacy policy 11:24 SAMSUNG Hint Check Answer < Question 15 of 39 > If 205 cal are added to 28.2 g of solid iron, what is the change in temperature of the iron? The specific heat of iron is 0.11-c. about us career placy policy masec 11:24 SAMSUNG 0 0 0 Question...
I need help compliting A&B, if you can show how you got it
that'll be great! thanks!
Section Code wala Sheet Table 11.1. Time-temperature data. A. Volume of HCl solution (m) Molarity of HCl solution (M) Volume of NOH solution (m) Molarity of NOHution M Initial temperature of HCl solution (C) Initial temperature of NaOH solution (C) Temperatures of solution ) 0.25 min 0.15 0.50 Run Run 2 49.5 49.8 2.119 2.119 53.2 53.6 2.087 2.087 18.9°C 18.8°C 19.0c 180C...
I need the solution for the volume of HCl.
Heat of Reaction for the Combustion of Magnesium Although you will not be working with actual chemicals during this laboratory, since you will be doing it virtually, the procedure is given in order for you to be aware of the process that would be followed in a laboratory setting. Introduction In this experiment, you will use Hess's Law to determine the heat for a reaction that is difficult to measure directly....
1. What would happen to each concentration unit (% mass/mass, M, and m) if you raise the temperature in the room? No change, increase, or decrease? Why?
Lab 14 Heat of Reaction Objective: To experimentally determine the heat of reaction for two exothermic reactions. Consider the following equations. (1) Mg(s) + 2HCI → MgCl2(aq) + H2(g) Hz(8) AH = ? (2) MgO(s) + 2HCl(aq) → MgCl(aq) + HOH (1) AH2 = ? The reactions represented by equations (1) and (2) will be our experimental work for today. Background: The heat given off or gained in a reaction is commonly called the heat of reaction. A reaction that...
would you do all the questions please
56) How much heat energy is required to raise the temperature of 0.298 mole of water from 35.93°C to 79.84" C? The specific heat capacity of water = 4.18 J/g"C A) 13.1 B) 54.7 J C) 985 J D) 2105 J E) 3310J 57) A 43.9-g piece of copper (Ccu= 0.385 J/g*C) at 135.0 C is plunged into 254 g ofwater at 39.0°C. Assuming that no heat is lost to the surroundings, what...
I need help understanding which heat equation and which specific
heat I need to use in this situation. I know we can have specific
heat per mol and per kg.
02 Two insulated cylinders Aand B with volumes VA 28 m3 and V8 5.0 m3 contain chlorine gas at different pressures and temperatures. The cylinders are insulated (no heat is lost to or gained from the outside) and connected by a valve. Initially, the valve is closed and the...
3. Here we use 4.184 for our calorimetry constant, since that is how much energy it takes to raise 1 gram of water by 1 degree Celsius. But what if we did not know that? How could I calibrate our calorimeter to find this value? -10 points 4. What are 2 sources of error for this experiment (you cannot simply say human error)? how would the error effect the measurement? - 10 points 5. How much energy would be transferred...
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