A 1.0 g sample of a cashew was burned in a calorimeter containing 1000. g of water, and the temperat — Thermodynamics Chemistry Question
Question
A 1.0 g sample of a cashew was burned in a calorimeter containing 1000. g of water, and the temperature of the water changed from 20.0°C to 25.0°C. In another experiment, a 3.0 g sample of a marshmallow was burned in a calorimeter containing 2000. g of water, and the temperature of the water changed from 25.0°C to 30.0°C. Based on the data, which of the following can be concluded about the energy content for 1.0 g of each of the two substances? (The specific heat of water is 4.2 J/(g⋅°C).)
The combustion of 1.0 g of cashew releases less energy than the combustion of 1.0 g of marshmallow.
The combustion of 1.0 g of cashew releases the same amount of energy as the combustion of 1.0 g of marshmallow.
The combustion of 1.0 g of cashew releases more energy than the combustion of 1.0 g of marshmallow.
No comparison can be made because the two systems started with different masses of food, different masses of water, and different initial temperatures.