Question

Heat of formation of water is - 272 kJ mol^-1. What quantity of water is converted to H₂ and O₂ by 750 kJ of heat?

विकल्प

• 7.5 mol

• 2.75 mol

• 5.5 mol

• 0.275 mol

Answer 1

2.75 mol

Explanation:

\[\ce{H2 + 1/2 O2 -> H2O}\] Δ H = - 272 kJ

1 mole of H₂O ⇒ - 272 kJ

? ← 750 kJ

`= 750/272` = 2.75 moles.

2.75 mole of H₂O is converted to H₂ and O₂.