Question

Peter conducted the investigation below to find the energy contained in a peanut. If the burning peanut raised 20 g of water from 18°C to 22°C, how much energy did it contain? Use the equation E = m × c × ΔT to find your answer. Assume that c (the specific heat capacity of water) is 4181 J/kg. Give your answer to two decimal places.

Answer 1

Answer:

334.48

Explanation:

delta T = 4 degrees

m = 20 grams of water

c = 4.181 J / gram

E = 20 * 4.181 * 4

E = 334.48 Joules

Remember to change c to Joules / gram

4181 j / kg * 1 kg / 1000 grams = 4.181 j / gram