A 5.45-g combustible sample is burned in a calorimeter. the heat generated changes the temperature of 555 g of water from 20.5°c to 39.5°c. how much energy is released by the burning? the specific heat of water is 4.18 j / (°c * g). 564 j 2,500 j 44,100 j 138,000 j

Given:

m = 555 g, the mass of water in the calorimeter

ΔT = 39.5 - 20.5 = 19 °C, temperature change

c = 4.18 J / (°C-g), specific heat of water

Assume that all generated heat goes into heating the water.

Then the energy released is

Q = mcΔT

= (555 g) * (4.18 J / (°C-g) * (19 °C)

= 44,078.1 J

= 44,100 J (approximately)

Answer: 44,100 J