Homework Help on 8.24

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John Huang 1G
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Homework Help on 8.24

Postby John Huang 1G » Tue Jan 23, 2018 10:40 pm

8.24) The enthalpy of combustion of benzoic acid, C6H5COOH, which is often used to calibrate calorimeters, is -3228 kj/mol. When 1.453g of benzoic acid was burned in a calorimeter, the temperature increased by 2.265 degrees Celsius. What is the heat capacity of the calorimeter?

I know this isn't one of the assigned problems, but doing this for extra practice.

When we write a thermochemcial equation, do we set the molecule of interest to 1 mol?

Andy Liao 1B
Posts: 52
Joined: Thu Jul 13, 2017 3:00 am

Re: Homework Help on 8.24

Postby Andy Liao 1B » Tue Jan 23, 2018 10:47 pm

When writing the thermochemical equation with enthalpy of formation/combustion, the molecule of interest must be set to 1 mole. In other words, the stoichiometric coefficient in front of it must be 1. This is because the enthalpy of formation/combustion is in terms of per 1 mole of the molecule of interest.


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