In a coffee cup calorimeter, a student adds 2.50 g of calcium, followed by addition of 50.0 mL of 1.00 M hydrochloric acid. After the reaction took place, a temperature change of 29.7oC was observed. If the reaction solution has the same properties of water and the calorimeter constant is 5.35 J oC-1, what is the heat released during the reaction in kJ? (Note: The mass of solution is the mass of all components added

A 0.010073 mol sample of an organic compound was burned in oxygen in a bomb calorimeter. The temperature of the calorimeter increased from 26.3 °C to 27.7 °C. If the heat capacity of the calorimeter is 4.56 kJ (°C), then what is the constant volume heat of combustion of this compound, in kilojoules per mole? (Remember to include a "+" or "-" sign in your answer, as appropriate.) Enter your answer with 3 significant figures. Do not include units as part of your answer. The constant volume heat of combustion is qv= Number kj mol-¹.

A generic solid, X, has a molar mass of 82.3 g/mol. In a constant-pressure calorimeter, 46.1 g of X is dissolved in 337 g of water at 23.00 °C. X(s) - X(aq) The temperature of the resulting solution rises to 29.50 °C. Assume the solution has the same specific heat as water, 4.184 J/(g.°C), and that there is negligible heat loss to the surroundings. How much heat was absorbed by the solution? 9.156 kJ Incorrect What is the enthalpy of the reaction? AHrxn 16.35 kJ/mol %D Incorrect

A generic solid, X, has a molar mass of 61.8 g/mol. In a constant-pressure calorimeter, 18.6 g of X is dissolved in 369 g of water at 23.00°C. X(s) X(aq) The temperature of the resulting solution rises to 24.30 °C. Assume the solution has the same specific heat as water, 4.184 J/(g.°C), and that there is negligible heat loss to the surroundings. How much heat was absorbed by the solution? 2.01 kJ Incorrect What is the enthalpy of the reaction? AHTan= 6.67 kJ/mol Incorrect