How much energy (in Joules) is released when 12.0 g of water cools from 20.0 °C to 11.0 °C? This is a grade 10 question from the Climate unit (from Canada)

Answer: - 452.088joule

Explanation:

Given the following:

Mass of water = 12g

Change in temperature (Dt) = (11 - 20) °C = - 9°C

Specific heats capacity of water (c) = 4.186j/g°C

Q = mcDt

Where Q = quantity of heat

Q = 12g * 4.186j/g°C * - 9°C

Q = - 452.088joule