Specific Heat — Prelims Questions

A $2,\text{kg}$ block of copper (specific heat $385,\text{J kg}^{-1}\text{K}^{-1}$) is heated from $20^circ\text{C}$ to $80^circ\text{C}$. How much heat energy is absorbed by the copper block?

Which of the following statements is true regarding the specific heats of an ideal gas?

A monatomic ideal gas is heated at constant volume. If its temperature increases by $10,\text{K}$, what is the change in its internal energy per mole? (Given $R = 8.314,\text{J mol}^{-1}\text{K}^{-1}$)

Two liquids A and B are mixed. Liquid A has a mass of $200,\text{g}$ and specific heat $2,\text{J g}^{-1}\text{K}^{-1}$ at $40^circ\text{C}$. Liquid B has a mass of $100,\text{g}$ and specific heat $4,\text{J g}^{-1}\text{K}^{-1}$ at $10^circ\text{C}$. Assuming no heat loss to the surroundings, what is the final temperature of the mixture?

Which of the following substances has the highest specific heat capacity?

The ratio of specific heats ($gamma = C_p/C_v$) for a diatomic ideal gas at moderate temperatures is approximately: