Final answer:
The student's question involves calculating the molar heat of combustion of acetic acid, which requires finding the total heat absorbed by both water and the calorimeter, and then relating it to the amount of substance burned.
Step-by-step explanation:
The student is asking to calculate the molar heat of combustion of acetic acid using a bomb calorimeter. The amount of acetic acid burned was 3.00 g and the resulting temperature rise was from 20.1 °C to 28.6 °C. The calorimeter has a specific heat capacity, and it also contains a known mass of water which also contributes to the heat absorption. The calculation involves determining the total heat absorbed by the water and calorimeter first and then converting this energy to the molar heat of combustion based on the number of moles of acetic acid burned.
Calculation Steps:
- Calculate the energy absorbed by the water:
- Calculate the energy absorbed by the calorimeter:
- Sum the energies to find the total heat absorbed during combustion:
- Calculate the moles of acetic acid burned:
- Calculate the molar heat of combustion of acetic acid: