Balancing chemical equations: TNT

TNT: C7H5N3O6

Trinitrotoluene (TNT) is a common material used in explosives. Upon detonation, the decomposition of TNT can proceed in the following 2 reactions:

1. 1 mole (mol.) of TNT producing nitrogen, water, carbon monoxide and carbon.

2. 1 mol. of TNT producing nitrogen, hydrogen, carbon monoxide and carbon.

Given complete reaction and that all products are returned to room temperature and pressure (25 deg C at 1 atm), How many more cubic decimetres ( $\text{dm}^3$ ) of gaseous products are produced per mole of TNT in reaction (2) compared to per mole of TNT in reaction (1)?

More in this series of problems for balancing chemical equations: Alcohol redox | TNT | CuSCN-KIO3 system