Question

A laboratory volcano can be made from ammonium dichromate via the reaction below: (NH4)2Cr2O7(s) --> N2 (g) + 4 H2O (g) + Cr2O3 (s). ΔH rxn = -315 kJ. How much heat is released (in kJ) if a student prepares a volcano and produces 28.4 g of water vapor?

Answer 1

from the balanced equation find the moles of the product of H2O and the relation ship between the moles and heat released in the equation will gives the final value as follows