Enthalpy of combustion of carbon graphite and carbon diamond is -293.5(kJ/mol) and - 670(kJ/mol) respectively. Calculate conversion of graphite into diamond.

Asked by Topperlearning User | 14th Aug, 2014, 09:58: AM

Expert Answer:

Aim equation: C (graphite) → C (diamond)
Given;
Graphite C (graphite) + O2(g) → CO2(g)             Syntax error from line 1 column 49 to line 1 column 73. Unexpected '<mstyle '. = -290.5  (kJ/mol)  ----1
Diamond C (diamond) + O2(g) → CO2(g)            Syntax error from line 1 column 49 to line 1 column 73. Unexpected '<mstyle '. = -670.5  (kJ/mol)  ----2
Subtract 2 from 1

C (graphite) → C (diamond)                                ∆H = + 380(kJ/mol)

Answered by  | 14th Aug, 2014, 11:58: AM