2.5 piece of lithium is dropped into a 500 g sample of water at 22.1 C. ten temperature of the water increases to 23.5 C. How much heat energy is released in the reaction

Question

Precious Olson

Chemistry

20 November, 04:43

2.5 piece of lithium is dropped into a 500 g sample of water at 22.1 C. ten temperature of the water increases to 23.5 C. How much heat energy is released in the reaction

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Answers (1)

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Irene Mata · Answer 1

2.6 kJ

Explanation:

The formula for the amount of heat (q) absorbed by the water is

q = mCΔT

1. Calculate ΔT

ΔT = 23.5 °C - 22.1 °C = 1.4 °C

2. Calculate q

q₂ = mCΔT = 500 g * 4.184 J·°C⁻¹g⁻¹ * 1.4 °C = 2900 J = 2.9 kJ