Calculate the energy change when 25.0 g of magnesium changes from 27°C to 45°C. The specific heat of magnesium is 1.05 J/g*°C. J

You have a calorimeter set up with 40 mL (40 g) of water. You perform a chemical reaction and notice the temperature change of the water is 15°C. What is the energy change of the chemical reaction? (cwater= 4.18 J/g*°C)
J

You have set up a calorimeter using 50 mL (50 g) of water. When performing a chemical reaction with the calorimeter, you notice the temperature of the water changes from 25.0°C to 50.0°C. What is the energy released by the chemical reaction? (cwater=4.18 J/g*°C
J

A calorimeter is set up with 30 g of water. You ignite a food item and as it burns causes the water to increase from 27°C to 39°C. What is the calorie value of the food item? (cwater= 1.00 cal/g*°C
J