Using the standard enthalpies of formation calculate the standard enthalpy of reaction for the combustion of propane: C3H8(g) + 5O2 → 3 CO2(g) + 4H2O
CO2(g) = -393.5 kJ/mol O2 = 0 kJ/mol H2O = -284 kJ/mol C3H8(g) = -272.5 kJ/mol

Usa Test prep

Do not include the unexpected results

The population of unionid mussels decreased after zebra mussels were introduced. zebra mussels competed with the unionid mussels for food. the zebra mussels were able to displace the unionid mussels, allowing the zebra mussel population to increase  over the years. the unionid mussel population decreased because  of lack of food.