Endothermic & Exothermic Reactions Video Lessons

Concept: Endothermic Reactions

# Problem: You may want to reference (Pages 177 - 178) Section 5.4 while completing this problem.Without referring to tables, predict which of the following has the higher enthalpy in each case.(a) 1 mol CO2(s) or 1 mol CO2(g) at the same temperature(b) 2 mol of hydrogen atoms or 1 mol of H2(c) 1 mol H2(g) and 0.5 mol O2(g) at 25˚C or 1 mol H2O(g) at 25˚C(d) 1 mol N2(g) at 100˚C or 1 mol N2(g) at 300˚C

###### FREE Expert Solution

(a) 1 mol CO2(s) or 1 mol CO2(g) at the same temperature

ΔH of gas > ΔH of solid

80% (439 ratings)
###### Problem Details

You may want to reference (Pages 177 - 178) Section 5.4 while completing this problem.

Without referring to tables, predict which of the following has the higher enthalpy in each case.
(a) 1 mol CO2(s) or 1 mol CO2(g) at the same temperature
(b) 2 mol of hydrogen atoms or 1 mol of H2
(c) 1 mol H2(g) and 0.5 mol O2(g) at 25˚C or 1 mol H2O(g) at 25˚C
(d) 1 mol N2(g) at 100˚C or 1 mol N2(g) at 300˚C