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A process can be Exothermic or Endothermic. Exothermic process of the following is
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a
Na+g+Cl−g→ NaCls
b
Nas→ Nag
c
Cl2g→ 2Clg
d
Nag+Clg→ Na+g+Cl−g
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Correct option is A
(1) is lattice enthalpy, the heat liberated when one mole of ionic solid is formed from its constituents gaseous ions.Na+g+Cl-g→ NaCls,ΔHU=−788kJ;2nd option….sublimation….Endothermic;3rd option…..atomization….Endothermic;4th option…..invoves IP(endothermic= +492kJ/mole) and EGE(exothermic= -361kJ/mole)Similar Questions
Hess's law is based on
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