Explanation
ΔSo=(So)products−(So)reactants
⟹ΔSo=(242.6)−(1×50.3+2×152.3)
⟹ΔSo=−112.3×10−3 kJ/k−mol
T=298 K (Room Temperature)
∵ΔG=ΔH−TΔS
⟹ΔH=ΔG+TΔS
⟹ΔH=−788.6+(298)(−112.3×10−3)
⟹ΔH=−755.1 kJ/mol
ΔH=(ΔH)product−(ΔH)reactant
ΔH=ΔHof(UBr4)−0
∴ΔHof=−755.1 kJ/mol
Hint: Elements that are stable as single atoms are known as monatomic or monoatomic elements.
It is given in the question, P=V and PV=1,
Thus,
dg=cvdt+Pdv
For 1 mole of gas PV=Rt,
Pdv+VdP=RdT
2PdV=RdT
PdV=RdT2
dg=Crdt+RdT2
=32R+R2
=4R2
Correct Option: A
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