UMN Exame De Acesso Practice Questions - Universidade Mandume Ya Ndemufayo University Entrance Examination (Exames De Acesso UMN) Exam

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Calculate the standard enthalpy of combustion (Delta_H_c) of methane gas according to the thermochemical equation: CH4(g) + 2 O2(g) -> CO2(g) + 2 H2O(l). Given standard enthalpies of formation: Delta_H_f(CH4) = -75 kJ/mol, Delta_H_f(CO2) = -394 kJ/mol, and Delta_H_f(H2O_l) = -286 kJ/mol.

-891 kJ/mol -966 kJ/mol +891 kJ/mol -605 kJ/mol

Correct Answer:

-891 kJ/mol

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