For an ideal gas, if Cv = 12.5 J/mol·K, what is Cp? (R = 8.314 J/mol·K)
For an ideal gas, Cp = Cv + R = 12.5 + 8.314 = 20.814 J/mol·K.
Ref: NCERT Class 11 Chemistry > Chapter 5: Thermodynamics > Topic: Third Law of Thermodynamics and Applications
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A system absorbs 800 J of heat at constant volume, and its temperature rises by 10 K. If Cv = 20 J/mol·K, how many moles
At constant volume, Δ U = qv = nCvΔ T. So, 800 = n × 20 × 10, n = 800 / 200 = 4 mol.
Ref: NCERT Class 11 Chemistry > Chapter 5: Thermodynamics > Topic: Thermodynamic Terms - System Surroundings and Types of Systems
The heat capacity of a gas at constant volume is 20 J/mol·K. What is Cp if it is an ideal gas? (R = 8.314 J/mol·K)
For an ideal gas, Cp = Cv + R = 20 + 8.314 = 28.314 J/mol·K.
Ref: NCERT Class 11 Chemistry > Chapter 5: Thermodynamics > Topic: Heat Capacity and Calorimetry and Measurement of Enthalpy
For an ideal gas, the relationship between molar heat capacities at constant pressure (Cp) and constant volume (Cv) is:
For an ideal gas, Cp - Cv = R, where R is the gas constant.
Ref: NCERT Class 11 Chemistry > Chapter 5: Thermodynamics > Topic: Bond Enthalpy and Entropy and Spontaneity