- #1

yecko

Gold Member

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## Homework Statement

for isentropic process, which of the following is true about the relationship of temperature and pressure?

(1): P2/P1=(T2/T1)^[γ/(γ-1)]

(2): P2/P1=(T2/T1)^[(γ-1)/γ]

where γ = 1.4 for air

## Homework Equations

stated above

## The Attempt at a Solution

I have found equation (1) in my module lecture notes and both equation (1) and (2) in my textbook.

Let me attached the image of the related part of the textbook here:

For (1): https://i.imgur.com/Z7vPTWX.png

For (2): https://i.imgur.com/nsrmUL0.png

I feel like they are giving out different answer and I am not sure which one is true or which implies in what specific condition.

Thank you very much!

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