Molar Enthalpy of combustion lab: mass of Mg (g) initial temp final temp change in temp 0.15 21.25 21.35 21.

enthalpy = +181 kj

Use hesses law to find the enthapy od reaction for the following equation.

3 NO2 + H2O —> 2HNO3 + NO enthalpy = ??

calculate the standard molar enthapy of combustion for cyclopropane.

In Effort to maximize the efficiency of propane barbecue. The oxygen to fuel ratio is altered. And two different trials the following reactions were observed.

TRIAL 1

C3H8 + 5 O2 —> 3 CO2 + 4 H2O

TRIAL 2

2 C3H8 + 7 O2 —> 2C + 2CO + 2CO2 + 8 H2O

calculate the molar Enthalpy of combustion for propane in each of the above reaction's.