Measuring enthalpy changes of reactions

2 marks · Easy

In a calorimetry experiment, a student mixes two solutions and records a 5.0 °C temperature rise. If 100 g of solution was used (specific heat capacity = 4.2 J/g°C), calculate the total heat energy released.

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2100 J (±1)

Also accept: 2100; 2.1 × 10^3 J

Common mistakes: Not multiplying by all factors

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Marking points

M1 · 1 mark · Substitutes values into q = m c ΔT (follow-through)

A1 · 1 mark · Calculates q = 2100 J correctly. (follow-through)

Worked solution