When 500 G of Butane, C₄H₁₀ (G), Burns in Oxygen, 247

When 5.00 g of butane, C₄H₁₀ (g) , burns in oxygen, 247 kJ of heat are released. What is D H for the following thermochemical equation?
2 C₄H₁₀ (g) + 13 O₂(g) 8 CO₂ (g) + 10 H₂ O ( )

A) +2.87×10³ kJ
B) +5.74×10³ kJ
C) - 5.74×10³ kJ
D) - 2.87×10³ kJ
E) none of these