3. Thermodynamics

Thermal Properties — Quiz

Test your understanding of thermal properties with 5 practice questions.

Practice Questions

Question 1

A 150 g metal block at 100 °C is dropped into 200 g of water at 20 °C in a calorimeter with heat capacity 40 J/°C. The final temperature is 30 °C. What is the specific heat capacity $c_m$ of the metal (in J/g°C)?

Question 2

How much heat energy is required to convert 100 g of ice at $-10\,^\circ\mathrm C$ into steam at $120\,^\circ\mathrm C$? Use $c_{\rm ice}=2.09\ \mathrm{J/g\,^\circ C}$, $L_f=334\ \mathrm{J/g}$, $c_{\rm water}=4.18\ \mathrm{J/g\,^\circ C}$, $L_v=2260\ \mathrm{J/g}$, and $c_{\rm steam}=2.00\ \mathrm{J/g\,^\circ C}$.

Question 3

Two substances A and B of equal mass are heated by identical constant power. On the melting plateau, A takes 150 s and B takes 300 s to fully melt. What is the ratio of their latent heats $L_A:L_B$?

Question 4

A 15 g lead bullet traveling at 400 m/s strikes a steel plate and stops. If 80% of its initial kinetic energy converts to heat within the bullet, what is its temperature increase? Use $c_{\rm Pb}=128\ \mathrm{J/kg\,^\circ C}$.

Question 5

Which statement correctly distinguishes constant‐pressure calorimetry from constant‐volume (bomb) calorimetry?