The value of Δ S at constant pressure needs to be determined when the temperature of 2.50 mol of an ideal gas having C v =5/2R is increased from 160. Concept Introduction : The change in entropy for an ideal gas at constant pressure can be calculated as follows: Δ S = nC p , m ln T f T i Here, Δ S = Change in entropy n = number of moles C p , m = molar heal capacity at constant pressure T = Temperature

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Chapter 5, Problem 5.23NP

(a)

Interpretation Introduction

Interpretation:

The value of ΔS at constant pressure needs to be determined when the temperature of 2.50 mol of an ideal gas having C_v=5/2R is increased from 160.

Concept Introduction :

The change in entropy for an ideal gas at constant pressure can be calculated as follows:

ΔS = nCp,mlnTfTi

Here, ΔS = Change in entropy

n = number of moles

C_p_,_m = molar heal capacity at constant pressure

T = Temperature

(b)

Interpretation Introduction

Interpretation:

The value of ΔS at constant volume needs to be determined when the temperature of 2.50 mol of an ideal gas having C_v=5/2R is incremented from 160.

Concept Introduction :

The change in entropy can be represented as follows:

ΔS = ∫d q reversibleT

Here ΔS = Change in entropy

q_r_e_v_e_r_s_i_b_l_e = reversible heat

T = Temperature

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