design experiments to determine how you can predict the value of the pressure in air or in water on earth. Describe your experiments and conclusions. Include specific data to support your ideas

Ammonia enters the expansion valve of a refrigeration system at a pressure of 10 bar and a temperature of 18oc and exits at 6.0 bar. the refrigerant undergoes a throttling process. determine the temperature, in oc, and the quality of the refrigerant at the exit of the expansion valve.