Paper 1 Thermal Physics A Drills

Q1

Temperature indicates

A. total internal energy.
B. direction of net thermal energy transfer.
C. mass of a body.
D. latent heat only.

Q2

Thermal equilibrium means two bodies in contact have

A. equal heat capacities.
B. no net thermal energy transfer.
C. equal masses.
D. equal volumes.

Q3

A thermometric property should vary

A. randomly with temperature.
B. monotonically and reproducibly with temperature.
C. only with mass.
D. discontinuously at all temperatures.

Q4

$-40^{\circ }\mathrm{C}$ is

A. $233\mathrm{K}$.
B. $273\mathrm{K}$.
C. $313\mathrm{K}$.
D. $-313\mathrm{K}$.

Q5

Specific heat capacity has unit

A. $\mathrm{J}\mathrm{k}{\mathrm{g}}^{-1}{\mathrm{K}}^{-1}$.
B. $\mathrm{J}\mathrm{k}{\mathrm{g}}^{-1}$.
C. $\mathrm{W}{\mathrm{K}}^{-1}$.
D. $\mathrm{kg}{\mathrm{J}}^{-1}$.

Q6

Energy needed to raise temperature is

A. $E=mc\Delta T$.
B. $E=mL$.
C. $E=pV$.
D. $E=IV/R$.

Q7

Energy needed for change of state is

A. $E=mc\Delta T$.
B. $E=mL$.
C. $E=mg/h$.
D. $E=\rho V$.

Q8

During boiling of a pure liquid at constant pressure, temperature

A. remains approximately constant.
B. rises linearly throughout.
C. falls to absolute zero.
D. doubles every second.

Q9

A larger specific heat capacity means, for the same mass and temperature rise, energy required is

A. smaller.
B. larger.
C. zero.
D. unchanged.

Q10

In an electrical heating experiment, input energy is commonly calculated as

A. $VIt$.
B. $VI/t$.
C. $V/I$.
D. $It/V$.

Q11

Heat loss to surroundings in a heating experiment makes the measured temperature rise

A. larger than ideal.
B. smaller than ideal.
C. exactly zero.
D. unrelated to energy input.

Q12

A heating curve plateau represents

A. no energy input.
B. change of state.
C. constant internal energy.
D. decreasing mass only.

Q13

In calorimetry, an energy balance assumes energy lost by hot object equals

A. energy gained by colder objects plus losses if included.
B. its mass.
C. zero always.
D. pressure change.

Q14

The kelvin scale is shifted from Celsius by approximately

A. $100$.
B. $273$.
C. $9.81$.
D. $6.02\times 10^{23}$.

Q15

Absolute zero corresponds to

A. $0^{\circ }\mathrm{C}$.
B. $-273.15^{\circ }\mathrm{C}$.
C. $100^{\circ }\mathrm{C}$.
D. $273.15^{\circ }\mathrm{C}$.

Q16

Specific latent heat of fusion concerns

A. solid-liquid change.
B. liquid-gas change only.
C. temperature rise only.
D. pressure-volume work.

Q17

Specific latent heat of vaporisation is usually larger than fusion because

A. molecules must become closer.
B. much more separation against attractions is required.
C. mass becomes zero.
D. temperature always decreases.

Q18

A temperature change of $15^{\circ }\mathrm{C}$ is equal to

A. $15\mathrm{K}$.
B. $288\mathrm{K}$.
C. $258\mathrm{K}$.
D. $1/15\mathrm{K}$.

Q19

A good calorimeter should have

A. high heat capacity and poor insulation.
B. low heat capacity and good insulation.
C. zero mass always.
D. high thermal conductivity to surroundings.

Q20

Heat capacity of an object is

A. energy per unit temperature rise for the whole object.
B. energy per unit mass per unit temperature rise.
C. always equal to latent heat.
D. pressure per kelvin.