Tamil Nadu Board of Secondary EducationHSC Science Class 11th

# Calculate the work done when 2 moles of an ideal gas expands reversibly and isothermally from a volume of 500 ml to a volume of 2 L at 25°C and normal pressure. - Chemistry

Numerical

Calculate the work done when 2 moles of an ideal gas expands reversibly and isothermally from a volume of 500 ml to a volume of 2 L at 25°C and normal pressure.

#### Solution

Given: n = 2 moles

Vi = 500 ml = 0.5 lit

Vf = 2 lit

T = 25°C = 298 K

w = − 2.303 nRT log ("V"_"f"/"V"_"i")

w = -2.303 xx 2 xx 8.314 xx 298 xx log (2/0.5)

w = − 2.303 × 2 × 8.314 × 298 × log (4)

w = − 2.303 × 2 × 8.314 × 298 × 0.6021

w = − 6871 J

w =− 6.871 kJ

Concept: System and Surrounding
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#### APPEARS IN

Tamil Nadu Board Samacheer Kalvi Class 11th Chemistry Volume 1 and 2 Answers Guide
Chapter 7 Thermodynamics
Evaluation | Q II. 28. | Page 225
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