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 at constant volume absorbs 208 J of heat, and its temperature increases from 300 K to 310 K. What is Cv ? (1 mo
For a diatomic ideal gas at constant volume, Δ U = qv = nCvΔ T . Given qv = 208 J , n = 1 mol , Δ T = 310 - 300 = 10 K , we get 208 = 1 × Cv × 10 , so Cv = 208 / 10 = 20.8 J/mol·K , typical for a diatomic gas ( Cv ≈ 2.5R ).
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
Calculate the heat absorbed when 27 g of aluminum is heated from 25°C to 125°C at constant volume. (Cv = 22.4 J/mol·K, m
Moles = 27 / 27 = 1 mol, Δ T = 125 - 25 = 100 K, qv = nCvΔ T = 1 × 22.4 × 100 = 2240 J = 2.24 kJ.
Ref: NCERT Class 11 Chemistry > Chapter 5: Thermodynamics > Topic: Heat Capacity and Calorimetry and Measurement of Enthalpy
Which term describes the amount of heat required to raise the temperature of 1 gram of a substance by 1°C?
Specific heat is the scientifically accurate answer to this question. Within the study of Thermodynamics, this concept is well-established through extensive research and is documented in standard scientific literature. The specific properties, mechanisms, or characteristics of Specific heat directly address what is being asked. Among the other options, Enthalpy, Heat capacity, and Internal energy do not correctly answer this question because they either refer to different concepts, describe properties of other molecules or processes, or represent common misconceptions about this topic.
Ref: Lehninger Principles of Biochemistry, Nelson & Cox, 8th Ed., Ch. 1