Ideal gas equation and heat problem

[Amith2006]

Sir,
An ideal gas is taken from state 1 to state 2. How does the volume change? The P-T diagram is as shown.
I solved it in the following way:
From the diagram it is clear that P/T is a constant. From ideal gas equation,
PV = nRT
V = (nR)/(P/T)
= constant
But the answer given in my book is that volume increases. I think the book answer is wrong. What do you say Sir?

 

[Andrew Mason]

Sir,
An ideal gas is taken from state 1 to state 2. How does the volume change? The P-T diagram is as shown.
I solved it in the following way:
From the diagram it is clear that P/T is a constant. From ideal gas equation,
PV = nRT
V = (nR)/(P/T)
= constant
But the answer given in my book is that volume increases. I think the book answer is wrong. What do you say Sir?

If the graph of P vs. T is a straight line, Volume must be constant. Is the P-T graph a straight line?

AM

 

[Amith2006]

Sir,
An ideal gas is taken from state 1 to state 2. How does the volume change? The P-T diagram is as shown.
I solved it in the following way:
From the diagram it is clear that P/T is a constant. From ideal gas equation,
PV = nRT
V = (nR)/(P/T)
= constant
But the answer given in my book is that volume increases. I think the book answer is wrong. What do you say Sir?

Yes Sir. It is a straight line.

 

[willydavidjr]

That would be definitely constant. Because on V=(nR)(P/T), the only value we need to consider here is P and T because it will be assume that they have the same number of n and R is constant also.