## Calorimeter

eduardomorales5
Posts: 77
Joined: Fri Aug 30, 2019 12:15 am

### Calorimeter

If we are given the heat capacity of the calorimeter, do we use that heat capacity to calculate the heat released by a chemical reaction? Or do we use the heat capacity of the molecules in the calorimeter?

Ipsita Srinivas 1K
Posts: 50
Joined: Mon Jun 17, 2019 7:24 am

### Re: Calorimeter

You can use either? Assuming that no heat is lost to the surroundings, the q value should be same whether you calculate heat gained by the calorimeter or heat lost by the system; it really depends on whichever is more convenient for you, and the data given. But you cannot use the heat capacities interchangeably; if you are using the temperature change and molar mass of the system's molecules, you can only use the system's specific heat capacity!

Posts: 116
Joined: Thu Jul 25, 2019 12:15 am

### Re: Calorimeter

The heat released by the chemical reaction will be equal to the heat absorbed by the calorimeter. So,
(mass of calorimeter) x (C of calorimeter) x (change in temp) = (mass of substance) x (Cs) x (change in temp)

DLee_1L
Posts: 103
Joined: Sat Aug 17, 2019 12:17 am

### Re: Calorimeter

Daria Azizad 1K wrote:The heat released by the chemical reaction will be equal to the heat absorbed by the calorimeter. So,
(mass of calorimeter) x (C of calorimeter) x (change in temp) = (mass of substance) x (Cs) x (change in temp)

For the calorimeter side of this equation, you would not include the mass of the calorimeter. I believe the specific heat for calorimeters do not include mass.

Megan Cao 1I
Posts: 103
Joined: Sat Sep 07, 2019 12:18 am

### Re: Calorimeter

I think you would use the heat capacity of the calorimeter, since it's what's absorbing the heat of the reaction.