Consider a thermodynamic process for which initial pressure and temperature are 8 bar and 350 K respectively. Upon expansion process, pressure and temperature changes to 2 bar and 300 K Calculate is the change in entropy for 1 kmol of an ideal gas. Use. Co = 29.3 kJ/kmol-K a) 8.50kJ kamol-K b) 7.00 kJ/kmol-K c) 6.32 kJ/kmol-K d) 5.00kJ/kmol-K
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7.00 kJ K⁻¹ kmol⁻¹ is the change in entropy for 1 kmol of an ideal gas.
Explanation:
Given:
- n = 1 kilomole
- P₁ = 8 bar
- P₂ = 2 bar
- T₁ = 350 K
- T₂ = 300 K
- Cp = 29.3 kJ K⁻¹ kmol⁻¹
To find:
- ΔS = ?
The change in entropy of a system can be given by the following formula:
On substituting the value of the given variables in the above formula, we get:
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