A 5 mole sample of liquid acetone is converted to a gas at 75. 0°C. If 628 J are required to raise the temperature of the liquid to the boiling point, 15. 600 kj are required to evaporate the liquid, and 712 J are required to raise the final temperature to 75. 0°C, what is the total energy required for the conversion?

An engineer designs a roller coaster so that a car travels horizontally for 152 ft, then climbs 137 ft at an angle of 34.0° above the horizontal. it then moves 137 ft at an angle of 48.0° below the horizontal. if we take the initial horizontal motion of the car to be along the +x-axis, what is the car's displacement? (give the magnitude of your answer, in ft, to at least four significant figures and give the direction of your answer in degrees counterclockwise from the +x-axis.)