Calculate the standard heat of formation for XMr3 if the reaction shown has an enthalpy of ΔH= {x} kJ/mol. Give your answer in kilojoules to 1 decimal place. X3 (g)+9Mr(g)→ 3XMr3(g) May 1, 2026 View Answer
The enthalpy of combustion of a new hydrocarbon is {x} kJ/mol. What is the enthalpy change from combusting {y} grams of the hydrocarbon with a molar mass of {z} g/mol at constant pressure and volume? Give your answer to 1 decimal place May 1, 2026 View Answer
The specific heat capacity of water is 4.18 J/g-C. You dissolve {x} grams of a salt with an enthalpy of solvation of {y} J/mol and a molar mass of {z} g/mol into 100 mL of water in an insulated calorimeter. The density of water is 1.0 g/mL. The initial temperature of the water is 25.0 degrees celsius. What should the maximum temperature of the solution reach? Give the answer to one decimal place. May 1, 2026 View Answer
You find a new metal on Mars. Its heat capacity is {x} J/gC. You want to heat {y} grams of this metal to its melting point of {z} C from an initial temperature of {a} C. How much heat must transfer to the metal during this process? Give your answer to two decimal places. May 1, 2026 View Answer