Q1. In which process does a substance change from solid to gas without becoming liquid? (2022)
Solution:
The process in which a substance changes from solid to gas without becoming liquid is called sublimation.
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Q2. What is the specific heat capacity of air? (2022)
Solution:
The specific heat capacity of air is approximately 1.005 J/kg·K.
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Q3. What is the formula for calculating the heat transfer due to conduction? (2023)
Solution:
The formula for calculating heat transfer due to conduction is Q = kA(T1-T2)/d, where k is the thermal conductivity, A is the area, and d is the thickness.
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Q4. What is the specific heat capacity of iron? (2023)
Solution:
The specific heat capacity of iron is approximately 0.45 J/g·K.
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Q5. Which law states that the rate of heat transfer through a material is proportional to the temperature difference? (2022)
Solution:
Fourier's Law states that the rate of heat transfer through a material is proportional to the temperature difference across it.
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Q6. What is the specific heat capacity of air at constant pressure? (2022)
Solution:
The specific heat capacity of air at constant pressure is approximately 1.005 J/kg·K.
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Q7. Which of the following processes involves the transfer of heat through the movement of fluids? (2021)
Solution:
Convection involves the transfer of heat through the movement of fluids.
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Q8. Which of the following is an example of thermal expansion? (2021)
Solution:
A balloon inflating when heated is an example of thermal expansion, as the gas inside expands with increased temperature.
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Q9. Which of the following processes involves the transfer of heat through a fluid? (2021)
Solution:
Convection is the process that involves the transfer of heat through a fluid (liquid or gas) due to the movement of the fluid itself.
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Q10. Which of the following processes involves a change of state without a change in temperature? (2018)
Solution:
Melting involves a change of state (solid to liquid) without a change in temperature.
