Navigate

At 298 K the enthalpy of formation of liquid water is -285.9 kJ/mol

At 298 K the enthalpy of formation of liquid water is -285.9 kJ/mol and that of steam -242.8 kJ/mol. The enthalpy of vapourisation of water is

Options

(a) 43.1 kJ/mol
(b) -43.1 kJ/mol
(c) 242.8 kJ/mol
(d) -242.8 kJ/mol

Correct Answer:

43.1 kJ/mol

Explanation:

ΔH(vap) = -242.8 – (-285.9) = 43.1 kJ/mol.

AMU2003
admin:

Related Questions

  1. For the equilibrium, H₂O(l) ⇌ H₂O(g) at 1 atm and 298 K,
  2. Tert-butyl bromide on treatment with sodium methoxide yields
  3. n-Butane and isobutane are
  4. The class of drugs used for the treatment of stress is
  5. A 2.5 mol sample of N₂H₄ loses 25 mol of electrons in being converted