Can someone please show me how to do this equation

[jim1174]

The temperature inside a closed vessel is 70 degrees F and the pressure of the contained gas is atmospheric pressure (14.7 PSIA).

If the temperature increases to 100 degrees, what is the pressure (measured in PSIA) inside the vessel? Show the equation and your calculations below.

Here is my answer

14.7 14.7
── = ───
70 100

 

[koldrakan]

What equation are you using? I would suggest the ideal gas law.

 

[SteamKing]

If you are working with any type of ideal gas law, you should know that you ALWAYS work with absolute temperatures.

 

[BvU]

Do I read ${14.7\over 70} = {14.7\over 100}$ ?
Your divisions are a little tough to read because in this forum multiple spaces are combined to 1 space, and there are no tabs (methinks).

Anyway: That's a tough cookie! No way to solve...
Quote me and correct me if I am quoting you wrongly.

 

[jim1174]

I need some help with this equation

I understand how to do the first part but i need help with the second part

The temperature inside a closed vessel is 70 degrees F and the pressure of the contained gas is atmospheric pressure (14.7 PSIA).

1. If the temperature increases to 100 degrees, what is the pressure (measured in PSIA) inside the vessel? Show the equation and your calculations below.

Answer 14.7 x (70 + 460) / (100 + 460) = 15.53

2. What is the pressure measured in PSIG at 70 degrees?

 

[Simon Bridge]

Please show your reasoning and your best attempt as the question.
Don't forget to include units in your answers.

Do you not know how to convert PSIA to PSIG?
i.e. the difference between absolute and gauge pressures?
http://en.wikipedia.org/wiki/Pounds_per_square_inch

 

[berkeman]

(Moderator Note -- 2 threads merged)