FRQ — Practicals and Activities

Short answer·Hard exam skill (4/5)·No calculator

Difficulty guide

The label describes the problem, not your ability.

1/5 - Foundational

Warm-up setup; checks one basic idea.

2/5 - Routine exam skill

Normal syllabus skill; usually one main rule or interpretation.

3/5 - Standard multi-step

Exam-style problem with multiple steps or a common trap.

4/5 - Hard exam skill

High-end exam problem; combines methods carefully.

5/5 - Challenge

Stretch problem beyond normal exam pressure.

Question

In a calorimetry experiment, a hot solid of mass

0.20\text{ kg}

80^\circ\text{C}

is placed in

0.30\text{ kg}

of water at

30^\circ\text{C}

. The final temperature is

35^\circ\text{C}

. Taking

c_w=4200\text{ J kg}^{-1}\text{K}^{-1}

and neglecting calorimeter heat capacity, find the specific heat of the solid.

Total: 5 marks

(a) Write the heat balance equation. (2 marks)

(b) Calculate the specific heat of the solid. (3 marks)

Your response (optional — you can also work on paper)

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