Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
JEE Main 20205 SeptemberEvening Shift
Exam
JEE Main
Year
2020
Date
5 September
Shift
Evening Shift
Subject
Chemistry
Chapter
Thermodynamics (C)

JEE Main 2020 · 5 September · Evening Shift · Chemistry · Thermodynamics (C)

Lattice enthalpy and enthalpy of solution of NaCl are 788 kJmol ^ -...

Lattice enthalpy and enthalpy of solution of NaClNaCl are 788kJmol−1788{kJmol}^{- 1}and 4kJmol−14kJmol{}^{- 1}, respectively. The hydration enthalpy of NaClNaClis:

Options

  1. A−780kJmol−1- 780{kJmol}^{- 1}
  2. B780kJmol−1780{kJmol}^{- 1}
  3. C−784kJmol−1- 784{kJmol}^{- 1}
  4. D784kJmol−1784{kJmol}^{- 1}

Correct answer

C. −784kJmol−1- 784{kJmol}^{- 1}

Step-by-step solution

Enthalpy of solution= Lattice enthalpy + enthalpy of hydration

4=788+∆Hhydration⇒∆Hhydration=−784KJ/mol4 = 788 + ∆ {H}_{hydration} ⇒ ∆ {H}_{hydration} = - 784KJ / mol

Practice Thermodynamics (C) on Quantrex Academy →

More from Thermodynamics (C)

An ideal gas ( 0.5 mol), initially at 2 bar pressure, is compressed at a constant… JEE Advanced 2026List-I contains various physical/chemical processes, and List-II contains combinations of… JEE Advanced 2026Consider the reaction 2H_2S(g) + 3O_2(g) arrow 2H_2O(l) + 2SO_2(g) The magnitude of… JEE Main 2026Match List - I with List - II. Given V_1 and V_2 are initial and final volumes… JEE Main 2026Arrange the following isothermal processes in order of the magnitude of the work ( p - V… JEE Main 2026Consider the reaction X leftharpoons Y at 300 K. If Δ H^ θ and K are 28.40 kJ mol ^ -1… JEE Main 2026Consider the following data for the reaction X_2(g) + Y_2(g) leftharpoons 2XY(g) at 600 K… JEE Main 2026The correct order of molar heat capacities measured at 298 K and 1 bar is : JEE Main 2026 Full Thermodynamics (C) list All JEE Main PYQs