JEE Advanced levelOne or more correct optionsDifficulty 3 of 3ce220
A reaction has ΔH∘=+60kJ/mol and ΔS∘=+150Jmol−1K−1, both independent of temperature (R=8.314Jmol−1K−1). Select the correct statements.
AlnK plotted against 1/T is a straight line with negative slope
BK=1 at 400K
CK>1 at 450K
DAdding an inert gas at constant temperature changes the value of K
Answer: A, B, C
lnK=−ΔH/RT+ΔS/R is linear in 1/T with slope −ΔH/R<0 (A true). K=1 when T=ΔH/ΔS=60000/150=400 K (B true). At 450 K, lnK=2.005, so K=7.42>1 (C true). K depends only on temperature (D false).