Question

For a reaction A + B ® AB, DCp is given by the equation 40 + 5 × 10^–3 T JK^–1 in the temperature range 300 – 600K. The enthalpy of the reaction at 300 K is –25 KJ, the enthalpy of reaction at 450 K is –

• A. – 10.4 K J
• B. – 18.72 KJ
• C. –25.64 KJ
• D. –38.93 KJ

Answer 1

Answer: (B)

– 18.72 KJ

Answer 2

DH₂ – DH₁ = $\int_{T_{1}}^{T_{2}}{\Delta CpdT}$