Monday
March 30, 2015

Homework Help: Chemistry

Posted by Anne on Wednesday, December 12, 2007 at 8:26pm.

drwls, if you are there, I got an answer of 42.5 Kelvin, so then that means it is a negative number if converted to degrees Celsius?

Question:

The heat capacity of a bomb calorimeter is 87.5 kJ/K (this value is for the total heat capacity including that of the water jacket around the reaction chamber). If 67.2g of CH4 (g), is combusted under such reaction conditions, what will be the increase in temperature of the calorimeter? Delta Ecombustion for CH4 (g) is -885.4 kJ/mol.


Answer:

drwls, Wednesday, December 12, 2007 at 7:38am

Calculate the heat energy release:
The number of moles of CH4 you are burning is 67.2/16 = 4.20 mol
Multiply that by 885.4 kJ/mol for the heat release. Then divide that by 87.5 kJ/K for the temperature rise.

Or, you could do it all at once

Delta T = (67.2g*885.4kJ/mol)/(16 g/mol*87.5 kJ/K) = ? K

Answer this Question

First Name:
School Subject:
Answer:

Related Questions

chemistry - Sucrose is commonly known as table sugar. The formula is C12H22O11. ...
Chemistry - The heat of combustion of benzene, C6H6, is -41.74 kJ/g. Combustion ...
Chemistry - The complete combustion of 0.100 mol of CH4 in oxygen in a bomb ...
Chemistry - 50mL of water at 46.9 degrees Celsius were mixed with 50mL of water ...
Chemistry - I got 0.907 KJ for ΔHcomb but I don't know if its correct. I ...
Chemistry - I have previously posted this question, but now I am lost question: ...
AP Chemistry - The combustion of 1.00 mol of sucrose,C12H22,O11, evolves 5650 kJ...
Chemistry Help!!! - 1) When hydrazine (N2H4) is burned in a 253-g brick ...
Chemistry - 1) When hydrazine (N2H4) is burned in a 253-g brick container, the ...
Chemistry - 1) When hydrazine (N2H4) is burned in a 253-g brick container, the ...

Members