8. Thermal Physics

Temperature And Heat — Quiz

Test your understanding of temperature and heat with 5 practice questions.

Practice Questions

Question 1

A 1.5 kg block of water is heated from 20°C to 80°C. The specific heat capacity of water is $4{,}200 \, \text{J/kg·°C}$. How much heat energy is required?

Question 2

A metal rod is 1.2 m long with a cross-sectional area of $0.005 \, \text{m}^2$. The temperature at one end is $120°C$ and at the other end is $40°C$. The thermal conductivity of the metal is $300 \, \text{W/m·°C}$. What is the rate of heat transfer through the rod?

Question 3

A 2 kg block of iron is heated from 30°C to 130°C. The specific heat capacity of iron is $450 \, \text{J/kg·°C}$. How much heat energy is absorbed by the block?

Question 4

A 0.75 kg sample of a substance absorbs $22{,}500 \, \text{J}$ of heat energy, and its temperature rises from 20°C to 80°C. What is the specific heat capacity of the substance?

Question 5

A metal rod with a thermal conductivity of $100 \, \text{W/m·°C}$ is $1.5 \, \text{m}$ long and has a cross-sectional area of $0.002 \, \text{m}^2$. The temperature difference between the ends is $200°C$. What is the rate of heat transfer through the rod?