When a 6.35-g sample of magnesium metal is burned, it produces enough heat to raise the temperature of 1,910 g of water from 24.00°C to 33.10°C. How much heat did the magnesium release when it burned?

the heat released by the magnesium is 72 kJ

Explanation:

the heat exchanged will be

Q = m*c * (T final - T initial)

where Q = heat released, c = specific heat capacity, T initial = initial temperature of water, T final = final temperature of water

Assuming the specific heat capacity of water as c = 1 cal/g°C=4.186 J/g°C

replacing values

Q = m * c * (T final - T initial) = 1910 g * 4.186 J/g°C * (33.10 °C - 24°C) = 72 kJ