Question

Describe in your own words the phase changes andenergy transfers that take place in each step of the refrigeration cycle. Build an energy transfer versus temperature (AE vs. T) plot that represents the transfer of energy as NH3 is taken from point 2 to point 3 in the refrigeration cycle. Clearly justify your reasoning. There are solid substances that can be used as refrigerants. They are made up of molecules that have a positively charged side and a negatively charged side as shown in the images. These types of substances may exist in two different types of phases A or B. Build the Potential Energy versus Configuration diagram (PEC diagram) representing phases A and B. Justify your reasoning. Predict which phase transition, from A to B or from B to A, will require absorption of energy to take place. Explain.

Answer 1

multiple questions allowed to solve only 1 question at a time so here is the soln for the problem 1).

Multiple questions allowed to solve only 1 question at a time so here is the soln for the problem 1). PHASE AND PHASE TRANSITION: Matter can exists in three unique stages (physical states): solid, liquid and gas. A stage is a type of matter that is uniform all through in synthatic creation and physical properties, ans that can be recognized from different stages with which it might be in contact by these unmistakable volume, and a substance in the gas stage has no positive shape or volume, yet has a shape and volume dictated by the shape and size of the container ENERGY TRANSFERS IN REFRIGERATION PROCESS: The first statement of the 2 nd law of thermodynamics - heat flows spontaneously from a hot to a cold body - tells us that an ice cube must melt on a hot day, rather than becoming colder. An explanation for this form of the 2 nd law can be obtained from Newton's laws