# Can someone please show me how to do this equation

• jim1174
In summary, the conversation discusses the relationship between temperature and pressure in a closed vessel containing gas. The ideal gas law is suggested as the equation to use, with the reminder to always work with absolute temperatures. The equation and calculations are shown for determining the pressure (in PSIA) inside the vessel when the temperature increases to 100 degrees. The question of converting PSIA to PSIG is also brought up for the pressure at 70 degrees.
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.

14.7 14.7
── = ───
70 100

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

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

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.

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?

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

(Moderator Note -- 2 threads merged)

## What is the equation that needs to be solved?

The first step in understanding how to solve an equation is identifying which equation needs to be solved. Make sure you have the correct equation before proceeding.

## What are the variables and their values in the equation?

It is important to know the values of each variable in the equation before attempting to solve it. If the values are not given, they must be solved for using other information provided.

## What is the correct order of operations for solving equations?

The correct order of operations for solving equations is PEMDAS: Parentheses, Exponents, Multiplication and Division (from left to right), and Addition and Subtraction (from left to right).

## What are the steps for solving the equation?

The general steps for solving an equation are: 1) Simplify both sides of the equation, 2) Combine like terms, 3) Isolate the variable by using inverse operations, and 4) Check your solution by plugging it back into the original equation.

## Can you provide an example of solving an equation?

Here is an example of solving the equation 2x + 5 = 15: 1) Simplify by subtracting 5 from both sides, 2) Combine like terms to get 2x = 10, 3) Isolate the variable by dividing both sides by 2, and 4) Check by plugging in x = 5 back into the original equation to make sure both sides are equal.

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