Life Sciences
GATE XL topic:thermodynamics PYQs
Build your understanding with focused practice from past exam papers.
Questions 11–15 of 15. Imported answers require independent review unless marked reviewed.
Question 15
Open questionXL-PNAT2 marksNeeds review
At a given pressure, a substance is heated from 2000 K to 2600 K. If the entropy of the substance is 60 J K
mol
, and is assumed to be constant over the given temperature range, then the change in the chemical potential (in kJ mol
) of the substance is ____________.Log in to check the answer
You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answerQuestion 12
Open questionXL-PNAT2 marksNeeds review
A protein in denatured state (D) is in equilibrium with native state (N).
D ⇌ N
At 360 K, both N and D states are equally populated. If the standard entropy change for the reaction at this temperature ΔS° = −139 J K⁻¹ mol⁻¹, then the corresponding standard enthalpy change ΔH° for the reaction in kJ mol⁻¹ (rounded off to one decimal place) is _____.
Log in to check the answer
You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answerQuestion 1
Open questionXL-PMCQ1 markNeeds review
For the complete combustion of graphite and diamond in oxygen individually, the standard enthalpy change (
) values are −393.5 kJ mol
and −395.4 kJ mol
, respectively. Then, the
for the conversion of graphite into diamond isYour answerChoose one option.
Log in to check the answer
You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answerQuestion 15
Open questionXL-PNAT2 marksNeeds review
One mole of helium gas in an isolated system undergoes a reversible isothermal expansion at 25 °C from an initial volume of 2.0 liters to a final volume of 10.0 liters. The change in entropy (ΔS) of the surroundings is ______ J K⁻¹ (up to two decimal places).
(Given: Gas constant R = 8.314 J K⁻¹ mol⁻¹)
Log in to check the answer
You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answerQuestion 3
Open questionXL-PMCQ1 markNeeds review
The extensive quantity among the following is
Your answerChoose one option.
Log in to check the answer
You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answer