1
Question
For the given reaction :
C2H4+Cl2→C2H4Cl2
△H=−270.6 kJmol−1 △S=−139 JK−1mol−1
Find △G in kJ/mol if T=300K?
For the given reaction :
C2H4+Cl2→C2H4Cl2
△H=−270.6 kJmol−1 △S=−139 JK−1mol−1
Find △G in kJ/mol if T=300K?
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Solution
The correct option is A −228.9
Given,
The reaction is C2H4+Cl2→C2H4Cl2△H=−270.6 kJmol−1K−1; △S=−139 JK−1
we know, △G=△H−T△S
=−270.6×1000−300×(−139)
=−228900J/mol
=−228.9 kJ/mol
Theory:
At constant Temperature :
ΔGsys=ΔHsys−TΔSsys
At constant pressure:
TΔSuniv=TΔSsys−ΔHsys
Given,
The reaction is C2H4+Cl2→C2H4Cl2△H=−270.6 kJmol−1K−1; △S=−139 JK−1
we know, △G=△H−T△S
=−270.6×1000−300×(−139)
=−228900J/mol
=−228.9 kJ/mol
Theory:
At constant Temperature :
ΔGsys=ΔHsys−TΔSsys
At constant pressure:
TΔSuniv=TΔSsys−ΔHsys
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