Heat energy changes in chemical reactions

Easy Medium

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Question 8

A student wants to investigate the amount of energy released when a 2.0 g sample of a liquid biofuel is burned.

They set up the apparatus to measure the temperature rise of the water as shown in the diagram:

A diagram of an experimental setup to measure the energy released by burning a liquid fuel. It shows a spirit burner containing biofuel positioned directly beneath a polystyrene cup filled with water. The cup is held in place by a clamp attached to a boss and stand. A thermometer is placed inside the water.