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5. Predict the conditions (high temperature, low temperature, all temperatures, or no tem-perature) under which each reaction is spontaneous. a) H2O(g) → H2O(l) b) CO2(s) → CO2(g) c) H2(g) → 2 H(g) d) 2 NO2(g) → 2 NO(g) + O2(g) (endothermic)