JEE AdvancedThermochemistryMedium
Question
Heat of neutralisation of CsOH with all strong acid is 13.4 kcal mol-1. The heat released on neutralisation of CsOH with HF (weak acid) is 16.4 kcal mol-1. of ionisation of HF is
Options
A.
3.0 kcal
B.-3.0 kcal
C.6.0 kcal
D.0.3 kcal
Solution
i. H+ + OH- → H2O           áƒH1 = - 13.4 kcal
ii. OH- + HF → H2O + F-    áƒH2 = - 16.4 kcal
iii. HF → H+ + F-           áƒH3 = ?
áƒH3 = áƒH2 - áƒH1
= -16.4 - (-13.4) = -3.0 kcal
ii. OH- + HF → H2O + F-    áƒH2 = - 16.4 kcal
iii. HF → H+ + F-           áƒH3 = ?
áƒH3 = áƒH2 - áƒH1
= -16.4 - (-13.4) = -3.0 kcal
Create a free account to view solution
View Solution FreeMore Thermochemistry Questions
The factor of ΔG values is important in metallurgy. The ΔG values for the following reactions at 800o C are given as fol...The bond enthalpies of C–C, C=C and C≡C bonds are 348, 610 and 835 kJ/mol, respectively at 298 K and 1 bar. The enthalpy...In an ice calorimeter, a chemical reaction is allowed to occur in thermal contact with an ice water mixture at 0oC. Any ...The ᐃHfo for CO2(g), CO(g) and H2O(g) are - 395.5, - 110.5 and - 241.8 kJ mol-1 respectively. The standard enthalp...If the bond dissociation energies of XY, X2 and Y2 (all diatomic molecules) are in the ratio of 1:1:0.5 and ᐃfH fo...