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ThermodynamicsMCQ

When MgO reacts with H2O at 25 ˚C and 1 atm, the volume change is –4.6 mL•mol–1. MgO(s) + H2O(l) → MThermodynamics Chemistry Question

Question

When MgO reacts with H2O at 25 ˚C and 1 atm, the volume change is –4.6 mL•mol–1.
MgO(s) + H2O(l) → Mg(OH)2(s)
What is the value of ∆H - ∆E for this reaction?

A.

–4.7 × 10–1 J•mol–1

✓ Correct
B.

–4.7 × 102 J•mol–1

C.

4.7 × 102 J•mol–1

D.

4.7 × 10–1 J•mol–1

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