Calculate triangle heat if 85.0 grams of SnO2 react in the following equation:

Question

2SnO2 arrow 2SnO + O2

Please write the steps and the answer

Thank You

Answer 1

Look up heat formation SnO2 and SnO.
delta Hrxn = (DHproducts)-(DHreactants).

[Note: heat formation O2 is zero).

Delta Hrxn will be for 2 moles SnO2. Find the proportion of 85.0 grams.