3. Thermodynamics
Temperature And Heat — Quiz
Test your understanding of temperature and heat with 5 practice questions.
Practice Questions
Question 1
A gas undergoes an adiabatic compression. Which of the following statements is true regarding the heat exchange ($Q$), the change in internal energy ($\Delta U$), and the work done on the gas ($W_{on}$)?
Question 2
Consider two objects, A and B, in thermal contact. Object A has a mass of $2 \text{ kg}$, a specific heat capacity of $400 \text{ J/kg}\cdot\text{K}$, and is initially at $100^{\circ}\text{C}$. Object B has a mass of $4 \text{ kg}$, a specific heat capacity of $200 \text{ J/kg}\cdot\text{K}$, and is initially at $20^{\circ}\text{C}$. Assuming no heat loss to the surroundings, what is the final equilibrium temperature of the system?
Question 3
A cylindrical rod of length $L$ and cross-sectional area $A$ has a thermal conductivity $k$. One end is maintained at temperature $T_1$ and the other at $T_2$, with $T_1 > T_2$. If the length of the rod is doubled and the cross-sectional area is halved, how does the new rate of heat transfer ($P'$) compare to the original rate ($P$)?
Question 4
An ideal gas is compressed isothermally. Which of the following statements is true regarding the heat exchange and the change in internal energy?
Question 5
A blackbody radiator at temperature $T$ emits radiation with a total power output $P$. If the temperature of the blackbody is doubled to $2T$, what is the new total power output ($P'$)?