4. A gas with a pressure of 5.4 atm and at 25C is raised to a new temperature of 78C.
What is the new pressure? (Show all of your work including identifying variables,
equation and your work)

Respuesta :

The answer for the following problem is mentioned below.

  • Therefore the final pressure of the gas is 6.3 atm

Explanation:

Given:

Initial pressure ([tex]P_{1}[/tex]) = 5.4 atm

Initial temperature ([tex]T_{1}[/tex]) = 25°C = 273 + 25 = 298 K

Final temperature ([tex]T_{2}[/tex]) = 78°C = 273 + 78 = 351 K

To solve:

Final pressure ([tex]P_{2}[/tex])

We know,

From the ideal gas equation,

P × V = n × R × T

Here from the above equation we can tell that ;

      P ∝ T

So;

we can write as;

  [tex]\frac{P}{T} \f[/tex] = constant

(i.e.)

        [tex]\frac{P_{1} }{P_{2} }[/tex] = [tex]\frac{T_{1} }{T_{2} }[/tex]

Where;

[tex]P_{1}[/tex] = Initial pressure of the gas

[tex]P_{2}[/tex] = final pressure of the gas

[tex]T_{1}[/tex] = initial temperature of the gas

[tex]T_{2}[/tex] = final temperature of the gas

              [tex]\frac{5.4}{P_{2} }[/tex]  = [tex]\frac{298}{351}[/tex]

               [tex]P_{2}[/tex] = [tex]\frac{5.4*351}{298}[/tex]

               [tex]P_{2}[/tex] = 6.3 atm

Therefore the final pressure of the gas is 6.3 atm