Given that bond energies of H—H and Cl—Cl are 430 kJ mol⁻¹ and 240 kJ mol⁻¹ respectively and ΔHf for HCl is –90 kJ mol⁻¹, bond enthalpy of HCl is
A
380 kJ mol⁻¹
B
425 kJ mol⁻¹
C
245 kJ mol⁻¹
D
290 kJ mol⁻¹

Question

Given that bond energies of H—H and Cl—Cl are 430 kJ mol⁻¹ and 240 kJ mol⁻¹ respectively and ΔHf for HCl is –90 kJ mol⁻¹, bond enthalpy of HCl is

Accepted Answer

425 kJ mol⁻¹

Answer

380 kJ mol⁻¹

Answer

245 kJ mol⁻¹

Answer

290 kJ mol⁻¹

AIPMT PRELIMS 2007 Chemistry Thermochemistry MCQ Question