For the reaction below, the constant pressure heat of reaction is qp = -1,650 kJ mol1 at 25 C. What is the constant volume heat of reaction at 25 C?

For the reaction below, the constant pressure heat of reaction is qp = -1,650 kJ mol−1 at 25 °C. What is the constant volume heat of reaction at 25 °C?

8 CO(g) + 17 H2(g) ⟶ C8H18(l) + 8 H2O(l)

Enter your answer in kJ mol−1, rounded to the nearest kilojoule.

The constant volume heat of reaction is qV =   kJ mol−1.