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# The following volume-temperature plots were made at different values of constant pressure while the number of moles of gas in each...?

The following volume-temperature plots were made at different values of constant pressure while the number of moles of gas in each experiment remained the same. Which plot represents measurements at the highest pressure?

A.B

B.A

C.They are all at the same pressure.

D.C

E.D

### 1 Answer

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- Dr WLv 74 weeks ago
B is the correct choice.

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the plot is V vs T.. and the question is about the slope.

so let's rearrange the ideal gas law into the form y = mx + b with y = V and x = T

.. PV = nRT

.. V = (nR/P) * T + 0

with slope = n*R/P

since P is in the denominator, the highest P value gives the lowest slope

the curve with the lowest slope is curve A and that is choice B

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