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ThermodynamicsMCQ

Given the enthalpy changes: A + B → C ∆H = –35 kJ•mol–1 A + D → E + F ∆H = +20 kJ•mol–1 F → C + E ∆HThermodynamics Chemistry Question

Question

Given the enthalpy changes:
A + B → C ∆H = –35 kJ•mol–1
A + D → E + F ∆H = +20 kJ•mol–1
F → C + E ∆H = +15 kJ•mol–1
What is ∆H for the reaction 2A + B + D → 2 F?

A.

0 kJ•mol–1

B.

–30 kJ•mol–1

✓ Correct
C.

–40 kJ•mol–1

D.

–70 kJ•mol–1

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