Question

If the absolute pressure of a gas is 550.280 kPa, its gage pressure is

A. 101.325 kPa.
B. 651.605 kPa.
C. 277.280 kPa.
D. 448.955 kPa.

Answer 1

The answer is D. 448.955 kPa

Answer 2

By definition we have to:

`image`

Where,

Pabs: absolute pressure

Patm: atmospheric pressure

Pg: gage pressure

The atmospheric pressure is constant and its value is:

`image`

Then, by clearing gage pressure we have:

`image`

Substituting values we have:

`image`

Answer:

If the absolute pressure of a gas is 550.280 kPa, its gage pressure is:

D. 448.955 kPa