Comprehension

The entropy versus temperature plot for phases \(\alpha\) and \(\beta\) at 1 bar pressure is given. \(S_T\) and \(S_0\) are entropies of the phases at temperatures \(T\) and \(0K\), respectively.

The transition temperature for \(\alpha\) to \(\beta\) phase change is \(600 K\) and \(C_P\), \(β − C_P\), \(\alpha = 1 \text{ J }mol^{−1} K^{-1}\). Assume \((C_P,\beta − C_P,\alpha)\) is independent of temperature in the range of \(200\) to \(700 K\). \(C_P,\alpha \text{ and }C_P,\beta\) are heat capacities of \(\alpha\) and \(\beta\) phases, respectively

Question: 1

The value of enthalpy change, H_β − H_α(in J mol⁻¹), at 300 K is ___.

Updated On: May 24, 2024

Hide Solution

Verified By Collegedunia

Correct Answer: 300

Solution and Explanation

The enthalpy change (Hβ−Hα) at 300 K is __ J mol−1−1.

Was this answer helpful?

Question: 2

The value of entropy change, S_β − S_α (in J mol⁻¹ K⁻¹), at 300 K is ___.
[Use: ln 2 = 0.69 ,Given: S_β − S_α= 0 at 0 K]

Updated On: May 24, 2024

Hide Solution

Verified By Collegedunia

Correct Answer: 0.31

Solution and Explanation

The correct answer is 0.31

Was this answer helpful?

Top Questions on Thermodynamics

Match List I with List II

List-I (Process)		List-II (Conditions)
(A)	Isothermal process	(I)	No heat exchange
(B)	Isochoric process	(II)	Carried out at constant temperature
(C)	Isobaric process	(III)	Carried out at constant volume
(D)	Adiabatic process	(IV)	Carried out at constant pressure

The value of enthalpy change, Hβ − Hα (in J mol−1), at 300 K is ___.

Correct Answer: 300

Solution and Explanation

The value of entropy change, Sβ − Sα (in J mol−1 K−1), at 300 K is ___. [Use: ln 2 = 0.69 ,Given: Sβ − Sα = 0 at 0 K]

Correct Answer: 0.31

Solution and Explanation

Top Questions on Thermodynamics

Questions Asked in JEE Advanced exam

The value of enthalpy change, H_β − H_α(in J mol⁻¹), at 300 K is ___.

The value of entropy change, S_β − S_α (in J mol⁻¹ K⁻¹), at 300 K is ___.
[Use: ln 2 = 0.69 ,Given: S_β − S_α= 0 at 0 K]