How much heat is produced when 2.80 mol of A reacts? 2A + B 2C + 2D Given: Substance Heat of Formation A -225 B -395 C 187 D -507 Step-by-step guide on how to solve this please. Thank you. :)

Question

How much heat is produced when 2.80 mol of A reacts? 

2A + B <=> 2C + 2D

Given:
Substance                   Heat of Formation
A                                  -225
B                                   -395
C                                  187
D                                  -507

Step-by-step guide on how to solve this please. Thank you. :)

anonymous · Answer

Steps for Future Reference:

1. Find the standard enthalpy of reaction using this formula:
|dw:1448222041002:dw|
you'll get 205 kJ/mol

2. Solve the heat absorbed, since I got 205 kJ/mol heat per 2 mol of A, if I'll have 2.80 mol, I should have 287 kJ:  (205/2) x (2.80) = 287 :)

You are very much welcome ;)

photon336 · Answer

Hm