Predict the conditions (high temperature, low temperature, all temperatures, or no temperatures) under which each of the following reactions will be spontaneous. a. H2O (g) →H2O (l) b. CO2 (s) →CO2 (g) c. H2 (g) →2H (g) d. 2NO2 (g) →2NO (g) + O2 (g) (endothermic)

Question

Chemistry

Sidney Huang

5 June, 05:06

Predict the conditions (high temperature, low temperature, all temperatures, or no temperatures) under which each of the following reactions will be spontaneous. a. H2O (g) →H2O (l) b. CO2 (s) →CO2 (g) c. H2 (g) →2H (g) d. 2NO2 (g) →2NO (g) + O2 (g) (endothermic)

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Emiliano Parks · Answer 1

Reaction a will be spontaneous at low temperature

Reaction b will be spontaneous at high temperature

Reaction c will be spontaneous at high temperature

Reaction d will be spontaneous at high temperature

Explanation:

Reaction a is an exothermic with a negative entropy and will act spontaneously at low temperature.

Reaction b, c, and d are endothermic reactions and have positive entropy, they will react spontaneously at high temperatures.