Chemistry Homework Help

Browse Homework Solutions

94 solutions

Heating and Cooling Curves

Q. Liquid butane (C4H10) and liquid propane (C3H8) are often stored in cylinders, to be used as fuels. The normal boiling point of butane is -0.5 °C and its ΔHvap is 23.1 kJ/mol. The corresponding values for propane are -42.1 °C and 15.4 kJ/mol, respectively. How much energy is required to vaporized 155 g of butane at its boiling point? The heat of vaporization for butane is 23.1 kJ/mol. Express your answer to three significant figures and include the appropriate units.

Solved • Jan 22, 2020

Heating and Cooling Curves

Q. How much energy is required to convert 10.0 g of ice at 0 °C? Assume that the ΔHfus = 6.02 kJ/mol. a) 60.2 kJ b) 0.602 kJ c) 3.34 kJ d) 10.8 kJ

Solved • Jan 20, 2020

Heating and Cooling Curves

Q. Liquid butane (C4H10) and liquid propane (C3H8) are often stored in cylinders, to be used as fuels. The normal boiling point of butane is -0.5 °C and its ΔHvap is 23.1 kJ/mol. The corresponding values for propane are -42.1 °C and 15.4 kJ/mol, respectively. How much energy is required to vaporize 165 g of butane at its boiling point? The heat of vaporization for butane is 23.1 kJ/mol. Express your answer to three significant figures and include the appropriate units.

Solved • Jan 20, 2020

Heating and Cooling Curves

Q. How long would it take for 1.50 mol of water at 100.0 °C to be converted completely into steam if heat were added at a constant rate of 16.0 J/s? Express your answer to three significant figures and include the appropriate units.

Solved • Jan 20, 2020

Heating and Cooling Curves

Q. How much heat energy, in kilojoules, is required to convert 53.0 g of ice at -18.0 °C to water at 25.0 °C? Express your answer to three significant figures and include the appropriate units.

Solved • Jan 20, 2020

Heating and Cooling Curves

Q. calculate the energy, in Kj, required to melt a tray of ice cubes at 0C. One ice cube has a mass of 62.0g and the tray contains 16 ice cubes.

Solved • Jan 3, 2020

Heating and Cooling Curves

Q. The heat of vaporization of benzene, C6H6, is 30.7 kJ/mol at its boiling point of 80.1 C. How much energy in the form of heat is required to vaporize 102 g benzene at its boiling point?

Solved • Dec 19, 2019