How can we determine if an integral is point function or path function?

2018-02-23 08:04:36

Given, P = pressure, T = temperature, v = specific volume. Which one of the following can be considered as property of system?

A) $\int Pdv$

B) $\int Vdp$

C) $\int (\frac{dT}{T}+\frac{Pdv}{V})$

D) $\int (\frac{dT}{T}-\frac{Vdp}{T})$

I think that property of a system should be a point function. But how can we determine if an integral is point function or path function?