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← Topic 16 overviewTOPIC 16 ASSESSMENT

Thermodynamics

CIE-style questions assess specific heat capacity, specific latent heat, internal energy and the first law of thermodynamics.

Objective question 1

Specific heat capacity is the energy required to raise the temperature of:

Objective question 2

During melting at constant pressure, supplied energy mainly increases:

Objective question 3

Internal energy is the sum of microscopic:

Objective question 4

With ΔU = Q + W, expansion work done by the gas makes W:

Objective question 5

For a complete thermodynamic cycle:

Structured question 1

Calculate energy needed to heat 0.80 kg of material through 25 K when c = 900 J kg⁻¹ K⁻¹.

Structured question 2

A 75 W heater melts 0.050 kg in 220 s. Ignoring losses, calculate the specific latent heat.

Structured question 3

A gas receives 620 J by heating and does 250 J of work. Using ΔU = Q + W, calculate its change in internal energy.