DP Physics (first assessment 2025)

Question 23M.2.SL.TZ1.2a

[Maximum mark: 3]

23M.2.SL.TZ1.2a

(a)

Show that the average rate at which thermal energy is transferred into the chocolate is about 15 W.

[3]

Markscheme

Reads change in temperature to be 45 − 31 OR 14 °C ✓

Q = 0.082 × 1.6 × 10³ × 14 = 1.84 × 10³ «J» ✓

P = $\frac{1.84 \times 10^{3}}{2.0 \times 60}$ = 15.3 $\approx$ 15 «W»✓

Must see either full substitution OR answer to at least 3 s.f. in MP3

Syllabus sections