Two separate sets of equilibrium data for different reactions are plotted on the same…
CHEMISTRY · Single correct · A Level · Chemistry · Thermodynamics · Thermodynamics
Problem
Two separate sets of equilibrium data for different reactions are plotted on the same axes of ΔG∘ versus lnK. Line A has a slope of –1.98 kJ mol⁻¹ per unit lnK, whereas Line B has a slope of –4.95 kJ mol⁻¹ per unit lnK. Both lines pass through the origin. Which statement is best supported by these observations?
(a) Both reactions were studied at the same temperature because both lines pass through the origin.
(b) Reaction represented by Line A was studied at a higher temperature than reaction represented by Line B.
(c) Reaction represented by Line B was studied at a higher temperature than reaction represented by Line A.
(d) The slope difference is due to differing ΔH∘ values; therefore the temperatures cannot be compared.