An ideal gas is subjected to the following changes. Answer the following questions:
(a) A curve showing the dependence of pressure on absolute temperature was obtained for a certain gas. Does compression or expansion takes place when the gas is being heated [constant moles]?

`{:("Code","Process"),(1,"Compression"),(2,"Expansion"):}`
(b) Use the volume temperature curve to find graphically the nature of change in the pressure of a gas during heating [constant moles.]

`{:("Code","Process"),(3,"Increases"),(4,"Decreases"),(5,"Remains constant"):}`
(c) The piston in a gas filled cylinder is lossely fitted aganist the wall of the cylinder and can slowly let the gas go past it. The volume temperature curve for the gas at constant pressure has the form shown in the figure. Use this curve to determine whether the amount of gas in the cylinder has increased or decreased.

`{:("Code","Amount of Gas"),(6,"Increases"),(7,"Decreases"),(8,"Remains constant"):}`
Write your answer as "abc", for example if your answer is code: 1,4,8 the, write your answer as 148.