1. Consider the following reaction: 2H2 + O2 ------> 2H2O deltaH(rxn)= -484 kJ W

ID: 793783 • Letter: 1

Question

1. Consider the following reaction: 2H2 + O2 ------> 2H2O deltaH(rxn)= -484 kJ

Which answer best describes the transfer heat that occurs when 1.70 mol of H2 reacts?

a. 823 kJ absorbed

b. 484 kJ released

c. 411 kJ absorbed

d. 411 kJ released

e. 823 kJ released

f. 484 kJ absorbed

2. Consider the following reation: 2Fe2O3 -----> 4Fe + 3 O2 deltaH(rxn)= +824.2 kJ

The decomposition of 14.0 g of Fe2O3 results in?

a. the release of 72.3 kJ of heat.

b. the absorption of 72.3 kJ of heat

c. the absorption of 5770 kJ of heat.

d. the release of 36.1 kJ of heat.

e. the release of 5770 kJ of heat.

f. the absorption of 36.1 kJ of heat.

f. 484 kJ absorbed

the release of 5770 kJ of heat.

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