When using a propane tank to light fuel in a camp stove or backyard grill, the propane tank will get cold. How is this the same as what occurs at the expansion valve?

(a) What is the heat loss per unit length of the pipe?(b) The pipe material is switched to PTFE (k = 0.38 W/(m⋅K)). To maintain the same heat loss as theprevious question, if all other parameters are to remain the same as before, what is the required thicknessof the pipe wall in centimeters?

A tire is inflated to a gage pressure of 35 psi at a temperature of 0ºF. Calculate the maximum temperature to which the tire may be heated without the gage pressure exceeding 50 psi.  A. 110ºF     B. 124ºF    C. 139ºF      D. 158ºF

When two objects at different temperatures are brought into contact with one another (such as a hot steel bar dropped into cold water), the cold object will O increase in temperature to the same temperature as the hot object before being placed in the water. O lose as much heat as the hot object loses the cold object will remain unchanged O gain as much heat as the hot object loses