Thermal Energy Transfers · Paper 1 — Free Physics HL Practice Questions

A metal pan is placed on a hot stove. The base of the pan reaches $180\ ^\circ\text{C}$ while the handle, made of the same metal, is initially at $20\ ^\circ\text{C}$. After a short time, the handle becomes too hot touch. Which statement correctly describes the energy transfer through the metal handle?

A metal rod at $80\ °\text{C}$ is placed into a thermally isolated beaker of water at $20\ °\text{C}$. Which of the following correctly describes the net direction of thermal energy transfer and the final equilibrium state?

A metal sphere at $90\,°\text{C}$ is placed into a thermally isolated calorimeter containing water at $20\,°\text{C}$. Both reach a final equilibrium temperature of $30\,°\text{C}$. Which statement correctly describes thermal energy exchange?

A digital thermometer records the temperature of water being heated on a hot plate. The reading changes from $20.0^\circ\text{C}$ to $80.0^\circ\text{C}$. What is the temperature change expressed in kelvin?