Thermodynamics

Q. What is the primary method of heat transfer from the Sun to the Earth?
  • A. Conduction
  • B. Convection
  • C. Radiation
  • D. Conduction and Convection
Q. What is the primary mode of heat transfer from the Sun to the Earth?
  • A. Conduction
  • B. Convection
  • C. Radiation
  • D. Conduction and Convection
Q. What is the primary mode of heat transfer in a vacuum?
  • A. Conduction
  • B. Convection
  • C. Radiation
  • D. Insulation
Q. What is the primary mode of heat transfer in liquids and gases?
  • A. Conduction
  • B. Convection
  • C. Radiation
  • D. None of the above
Q. What is the primary reason for using insulation in buildings?
  • A. To prevent conduction
  • B. To enhance convection
  • C. To increase radiation
  • D. To allow heat flow
Q. What is the principle behind a thermometer?
  • A. Expansion of liquid with temperature
  • B. Contraction of gas with temperature
  • C. Change in color with temperature
  • D. Change in pressure with temperature
Q. What is the relationship between enthalpy (H), internal energy (U), pressure (P), and volume (V)?
  • A. H = U + PV
  • B. H = U - PV
  • C. H = U + P/V
  • D. H = U - P/V
Q. What is the relationship between heat capacity at constant pressure (Cp) and heat capacity at constant volume (Cv)?
  • A. Cp = Cv
  • B. Cp > Cv
  • C. Cp < Cv
  • D. Cp = Cv + R
Q. What is the relationship between heat capacity at constant volume (Cv) and heat capacity at constant pressure (Cp)?
  • A. Cp = Cv
  • B. Cp = Cv + R
  • C. Cp = Cv - R
  • D. Cp = 2Cv
Q. What is the relationship between heat capacity at constant volume (Cv) and heat capacity at constant pressure (Cp) for an ideal gas?
  • A. Cp = Cv
  • B. Cp = Cv + R
  • C. Cp = Cv - R
  • D. Cp = 2Cv
Q. What is the relationship between temperature and kinetic energy of particles in a substance?
  • A. Directly proportional
  • B. Inversely proportional
  • C. No relationship
  • D. Depends on the substance
Q. What is the relationship between temperature and kinetic energy of particles?
  • A. Directly proportional
  • B. Inversely proportional
  • C. No relation
  • D. Exponential relation
Q. What is the SI unit of temperature?
  • A. Celsius
  • B. Fahrenheit
  • C. Kelvin
  • D. Rankine
Q. What is the SI unit of thermal conductivity?
  • A. W/m·K
  • B. J/kg·K
  • C. K/W
  • D. J/m·s
Q. What is the significance of the First Law of Thermodynamics?
  • A. It defines the concept of temperature
  • B. It establishes the conservation of energy principle
  • C. It describes the behavior of gases
  • D. It relates pressure and volume
Q. What is the specific heat capacity at constant volume (Cv) for a monatomic ideal gas?
  • A. 3/2 R
  • B. 5/2 R
  • C. R
  • D. 2 R
Q. What is the specific heat capacity of a substance?
  • A. The amount of heat required to change its temperature by 1 degree Celsius
  • B. The amount of heat required to change its state
  • C. The heat required to raise the temperature of a unit mass by 1 degree Celsius
  • D. The heat required to cool a substance
Q. What is the specific heat capacity of water if 500 J of heat is required to raise the temperature of 100 g of water by 5°C?
  • A. 1 J/g°C
  • B. 2 J/g°C
  • C. 4 J/g°C
  • D. 5 J/g°C
Q. What is the specific heat capacity of water?
  • A. 1 J/g°C
  • B. 4.18 J/g°C
  • C. 2 J/g°C
  • D. 0.5 J/g°C
Q. What is the Stefan-Boltzmann law related to?
  • A. Conduction
  • B. Convection
  • C. Radiation
  • D. Thermal expansion
Q. What is the term for the amount of heat required to raise the temperature of 1 kg of a substance by 1 degree Celsius?
  • A. Heat capacity
  • B. Specific heat capacity
  • C. Latent heat
  • D. Thermal conductivity
Q. What is the term for the amount of heat required to raise the temperature of a unit mass of a substance by one degree Celsius?
  • A. Heat capacity
  • B. Specific heat
  • C. Latent heat
  • D. Thermal conductivity
Q. What is the term for the heat transfer that occurs due to the movement of a fluid?
  • A. Conduction
  • B. Convection
  • C. Radiation
  • D. Insulation
Q. What is the term for the transfer of heat through electromagnetic waves?
  • A. Conduction
  • B. Convection
  • C. Radiation
  • D. Conduction and Convection
Q. What is the unit of heat in the SI system?
  • A. Joule
  • B. Calorie
  • C. Watt
  • D. Newton
Q. What is the unit of thermal conductivity?
  • A. W/m·K
  • B. J/kg·K
  • C. K/W
  • D. J/m·s
Q. What is the value of the universal gas constant R in J/(mol·K)?
  • A. 8.314
  • B. 0.0821
  • C. 1.987
  • D. 22.414
Q. What is the work done by a gas during an isobaric expansion?
  • A. Zero
  • B. PΔV
  • C. ΔU
  • D. Q
Q. What is the work done by a gas during expansion against a constant external pressure?
  • A. PΔV
  • B. ΔU
  • C. Q
  • D. 0
Q. What is the work done by a gas during expansion at constant pressure?
  • A. PΔV
  • B. ΔU
  • C. Q
  • D. 0
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