Chemistry Practice Problems Hess's Law Practice Problems Solution: Given these values of ΔH° : CS2 (l) + 3O2(g) → CO...

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Solution: Given these values of ΔH° : CS2 (l) + 3O2(g) → CO2(g) + 2SO2(g)            Δ H° = -1077 kJ H2 (g) + O2 → H2O2(l)                                    Δ   H° = -188 kJ                 H2 (g) 1/2 O2(g) → H2O(l)                              Δ   H° =  -286 kJ What is the value of  ΔH° for this reacion? CS2(l) + 6H2O2(l) → CO2(g) + 6H2O (l) + 2SO2(g) a) -1175 kJ•mol-1 b) -1151 kJ•mol-1 c) -1665 kJ•mol-1 d) -3921 kJ•mol-1

Problem

Given these values of ΔH° :

CS2 (l) + 3O2(g) → CO2(g) + 2SO2(g)            Δ H° = -1077 kJ

H2 (g) + O2 → H2O2(l)                                    Δ   H° = -188 kJ                

H2 (g) 1/2 O2(g) → H2O(l)                              Δ   H° =  -286 kJ

What is the value of  ΔH° for this reacion?

CS2(l) + 6H2O2(l) → CO2(g) + 6H2O (l) + 2SO2(g)

a) -1175 kJ•mol-1

b) -1151 kJ•mol-1

c) -1665 kJ•mol-1

d) -3921 kJ•mol-1