Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
NEETChemistryThermodynamics (C)

According to the Born-Haber Cycle, what is the relationship between the sum of enthalpy changes around the cycle and the lattice enthalpy (∆latticeH)?

Options

  1. AThe sum of enthalpy changes around the cycle is greater than the lattice enthalpy.
  2. BThe sum of enthalpy changes around the cycle is smaller than the lattice enthalpy.
  3. CThe sum of enthalpy changes around the cycle is equal to zero.
  4. DThe sum of enthalpy changes around the cycle is equal to the heat of combustion.

Correct answer

C. The sum of enthalpy changes around the cycle is equal to zero.

Step-by-step solution

The Born-Haber Cycle is constructed in such a way that the sum of enthalpy changes around the cycle is zero, in accordance with Hess's law.

Practice Thermodynamics (C) on Quantrex Academy →

More from Thermodynamics (C)

A certain organic solvent has H _vap = 28.50 kJ mol ⁻¹ and S _vap = 88.2 J K ⁻¹ mol ⁻¹ at 1 bar. Calculate its normal boiling point (where G = 0 ). 2026Which of the following statements regarding spontaneous process is NOT true? 2026Calculate H for a reaction, 2X_ (g) + Y_ (g) 2Z_ (g) at 298 K if U = -10.5 kJ and R = 8.314 J K ⁻¹ mol ⁻¹ . 2026500 mL of nitrogen gas and 750 mL hydrogen gas were allowed to react at 1 bar pressure according to reaction, N _ 2(g) + 3 H _ 2(g) 2 NH _ 3(g) What is PV type of work done during 2026The relationship between H and U for the reaction, PCl ₃(g) + Cl ₂(g) PCl ₅(g) is given as 2026What would be the heat released in kJ when 450 cm ^3 of 0.02 M H ₂ SO ₄ is mixed with 650 cm ^3 of 0.1 M NaOH ? (Heat of neutralization of H ₂ SO ₄ and NaOH is -114 kJ/mol of H ₂ S 2026Identify from following reactions that it takes place with H = U . 2026Calculate the work done in the following reaction at 300 K , A (g) + B (g) = 2 C (g) [R = 8.314 JK ⁻¹ mol ⁻¹] 2026 Full Thermodynamics (C) list All NEET PYQs