Question

When a chemical reaction is reversed the value of enthalpy is ..... in sign.

• A. reversed
• B. never reverses
• C. remains same
• D. is zero

Answer 1

Answer:

A. reversed

For example, the formation of ammonia has an enthalpy of -91.8 KJ per mole and the decomposition of ammonia has an enthalpy of + 91.8 KJ per Mol.