passwella.
Menu

JAMB Chemistry 2007 Question 18

Question 18

Energy Changes

C2H4(g) + H2(g) → C2H6(g) ΔH = −137kJ mol−1
The reaction represented above is

  1. A.exothermic
  2. B.spontaneous
  3. C.endothermic
  4. D.in equilibrium.
Show the answer and explanation

Answer: A (exothermic)

Explanation

A negative ΔH means heat is given out, so the reaction is exothermic.