One mole of h,0 is cooled from 25°c to 0°c and frozen. all the heat is delivered to a second mole of h, o initially at 25°c, heating it to 100°c. the refrigerating machine is operating at maximum theoretical efficiency (no entropy created) (a) how much work must be done by the refrigerator? (b) what fraction of the second mole is converted to steam at 100 c? (the heat capacity of water is 18 cal/mole degree: the heat of vaporization at 100°c is 9730 calmole; the heat of fusion at 0°c is 1438 cal/mole.)

What are the three ways that an object can accelerate

Arowboat passenger uses an oar to push the boat off the dock by exerting a force of 40n for 3.0s. what impulse acts on the boat.

An charge with mass m and charge q is emitted from the origin, (x,y)=(0,0). a large, flat screen is located at x=l. there is a target on the screen at y position y(h), where y(h) > 0. in this problem, you will examine two different ways that the charge might hit the target. ignore gravity in this problem. 1.assume that the charge is emitted with velocity v(0) in the positive x direction. between the origin and the screen, the charge travels through a constant electric field pointing in the positive y direction. what should the magnitude e of the electric field be if the charge is to hit the target on the screen? express your answer in terms of m, q, y(h), v(0), and l. 2.now assume that the charge is emitted with velocity v(0) in the positive y direction. between the origin and the screen, the charge travels through a constant electric field pointing in the positive x direction. what should the magnitude e of the electric field be if the charge is to hit the target on the screen? express your answer in terms of m, q, y(h), v(0), and l.