Bond dissociation enthalpy of H₂, Cl₂, and HCl are 434, 242 and 431 kJ mol⁻¹ respectively. Enthalpy of formation of HCl is -
A
–93 kJ mol⁻¹
B
245 kJ mol⁻¹
C
93 kJ mol⁻¹
D
–245 kJ mol⁻¹

Question

Bond dissociation enthalpy of H₂, Cl₂, and HCl are 434, 242 and 431 kJ mol⁻¹ respectively. Enthalpy of formation of HCl is -

Accepted Answer

–93 kJ mol⁻¹

Answer

245 kJ mol⁻¹

Answer

93 kJ mol⁻¹

Answer

–245 kJ mol⁻¹

AIPMT PRELIMS 2008 Chemistry Thermochemistry MCQ Question