Question

What will be the enthalpy of combustion of carbon to produce carbon monoxide on the basis of data given below. $C_{(s)} + O_{2(g)} \rightarrow CO_{2(g)} - 393.4kJ$

$CO_{(g)} + \frac{1}{2}O_{2(g)} \rightarrow CO_{2(g)} - 283.0kJ$

• A. $+ 676.4kJ$
• B. $- 676.4kJ$
• C. $- 110.4kJ$
• D. $+ 110.4kJ$

Answer 1

: $C + \frac{1}{2}O_{2} \rightarrow CO$is obtained by (i) – (ii).

$- 393.4 - ( - 283.0) = - 110.4kJ$