Question

In an endothermic reaction, the value of change
in enthalpy ( ΔH) is
(a) positive (b) zero
(c) negative (d) either (b) or (c)

Answer 1

Answer:

d either b or c is the correct answer

Answer 2

In an endothermic reaction, the value of change  in enthalpy (ΔH) is  (a) positive.

Explanation:

• Endothermic process absorbs heat energy from the surrounding.
• The energy produced by the product is greater than the energy produced by the reactants.
• The change in enthalpy is given by the formula:

ΔH = Ep - Er

∵ Ep > Er

∵ ΔH = Positive value

• Some of the endothermic reactions are:

C + H₂O → H₂ + CO