Explore BrainMass
Share

Calorimetry, calculations of heat energy required etc.

This content was STOLEN from BrainMass.com - View the original, and get the already-completed solution here!

7. It takes 585 J of energy to raise the temperature of 125.6 g mercury from 20.0 degrees C to 53.5 degrees C. Calculate the molar heat capacity of mercury in J/(mol degrees C).

8. The specific heat capacity of silver is 0.24 J/(g x degrees C).

It takes 3.57 kJ of energy to heat a sample of pure silver from 12.0 degrees C to 14.1 degrees C. Calculate the mass of the sample of silver (in kg).

9. The specific heat capacity of silver is 0.240 J/(g x degrees C).

Calculate the energy (in kJ) required to raise the temperature of 263 g Ag from 273K to 278 K.

© BrainMass Inc. brainmass.com October 24, 2018, 8:33 pm ad1c9bdddf
https://brainmass.com/chemistry/physical-chemistry/calorimetry-calculations-heat-energy-required-100530

Solution Preview

Please see the attached file.

7. It takes 585 J of energy to raise the temperature of 125.6 g mercury from 20.0 degrees C to 53.5 degrees C. Calculate the molar heat capacity of mercury in J/(mol degrees C).

Molar heat capacity is the amount of heat required to raise ...

Solution Summary

The problems are to calculate the heat required, specific heat capacities, molar heat capacity and mass of the substance.

These problems are solved using the definition of specific heat capacity.

$2.19
See Also This Related BrainMass Solution

Thermo-chemistry

1.) If 596 J of heat are added to 29.6 g of water at 22.9 degrees Celsius in a coffee cup calorimeter, what will be the final temperature of the water?
2.) A 5.037 g piece of iron heated to 100. degrees Celsius is placed in a coffee cup calorimeter that initially contains 27.3 g of water at 21.2 degrees Celsius. If the final temperature is 22.7 degrees Celsius, what is the specific heat capacity of the iron (J/g, degrees Celsius)
3.) The specific heat of aluminum is 0.89 J/g, degrees Celsius. How much energy is required to raise the temperature of a 15.0 g aluminum can 18 degrees Celsius?
4.) One liter of an ideal gas at 0 degrees Celsius and 10 atm was allowed to expand to 1.89 L against a constant external pressure of 1 atm at a constant temperature. The enthalpy change (delta H) for this process is -901 J. Calculate q, w, and delta E.
5.) The heat capacity of a bomb calorimeter was determined by burning 6.79 g methane (heat of combustion= -802 kJ/mol) in the bomb. The temperature changed 10.8 degrees Celsius.
a. What is the heat capacity of the bomb?
b. A 12.6 g sample of acetylene, C2H2, produced a temperature increase of 16.9 degrees Celsius in the same calorimeter. What is the heat of combustion of acetylene (kJ/mol)?

View Full Posting Details