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

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