In the 3d series, the .enthalpy of atomisation of zinc is the lowest `(126kJmol^-1)`. Why?

In the séries Sc(Z= 21) to Zn(Z=30), the erithalpy of atoritisation of zinc is the Iowest, ie '126 (~kJ)' mol-1. Why?

Assertion : In the series Sc to Zn, the enthalpy of atomisation of zinc is the lowest. Reason : Zinc has greater number of unpaired electrons.

Acetic acid and hydrochloric acid react with KOH solution. The enthalpy of neutralization of acetic acid is -55.8 kJ mol^(-1) while that of hydrochloric acid is -57.3 kJ 'mol^(-1) . Why?

Ethanol boils at '78.4^circ C'. The enthalpy of vaporisation of ethanol is '42.4 kJmol^(-1)'. Calculate the entropy of vaporisation of ethanol.

Transition elements generally have high enthalpy of atomisation and they show variable oxidation states Why do transition elements exhibit higher enthalpies of atomisation?

Calculate the enthalpy change for the process 'CCl_4(g) rarr C(g)+4 Cl(g)' and calculate bond enthalpy of 'C-Cl' in 'CCl_4(g)' 'Delta_(vap) H_^0 (C C l_4)=30.5 kJ mol ^(-1)' 'Delta_f H^0(C C l_4)=(-1)35.5 kJ mol^(-1)' 'Delta_n H^0(C)=715.0 kJ mol^(-1)', where 'Delta_n H^0' is enthalpy of atomisation, 'Delta_n H^ (Cl_2)=242 kJ mol^(-1)'