6.54 calculate the heats of combustion for the following
aris reactions from the standard enthalpies of formation
listed in appendix 3:
(a) c2h4(g) + 302(g) → 2c02(g) + 2h2o(1)
(b) 2h, s(g) + 302(g) → 2h2o(l) + 2502(g)

answer:

calculate the heats of combustion for the following reactions from the standard enthalpies of formation listed in the text: (a) 2h2(g) + o2 (> 2h2o

explanation:

because natural gas is colorless, odorless, and tasteless, distributors add mercaptan (a chemical that smells like sulfur) to give natural gas a distinct unpleasant odor (it smells like rotten eggs). they locate the types of rock that are likely to contain natural gas deposits.