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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Answer:

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.

  • 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.

What is Temperature?

This is defined as the degree of hotness or coldness of a substance. Exothermic reactions act spontaneously at low temperature.

On the other hand, endothermic reactions acts spontaneously at high temperature.

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