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A cylinder fitted with a movable piston contains ideal gas at 27 degrees C, pressure 0.50*10^5 Pa, and volume 1.25 m. What will be the final temperature if the gas is compressed to 0.80 m^3 and the pressure rises to 0.82*10^5 Pa?


Sagot :

The final temperature is calculated to be 41.8 degrees Celcius if the gas is compressed to 0.80 m^3 and the pressure rises to 0.82*10^5 Pa

The final temperature can be calculated by using the combined gas law as follows;

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

Here [tex]P_{1}[/tex] and [tex]P_{2}[/tex] represent the initial and final pressure respectively,

[tex]V_{1}[/tex] and [tex]V_{2}[/tex] represent the initial and final volume respectively

[tex]T_{1}[/tex] and [tex]T_{2}[/tex] represent the initial and final temperature respectively

Converting [tex]T_{1}[/tex] to kelvin as follows;

[tex]T_{1}[/tex] = 27 degrees Celcius = 27 + 273 = 300 K

Now the final temperature can be determined by substituting the values in this equation of the combined gas law as follows;

(0.50×10^5)(1.25) / 300 = (0.82×10^5)(0.80) / [tex]T_{2}[/tex]

208.333333333 = (0.82×10^5)(0.80) / [tex]T_{2}[/tex]

208.333333333 ([tex]T_{2}[/tex]) = (0.82×10^5)(0.80)

[tex]T_{2}[/tex] = (0.82×10^5)(0.80) ÷ 208.333333333

[tex]T_{2}[/tex] = 314.8 K

Converting K to degree Celcius as follows;

[tex]T_{2}[/tex] = 314.8 - 273 = 41.8 degree Celcius

Hence 41.8 degrees Celcius is calculated to be the final temperature.

Although a part of your question is incorrect, you might be referring to this question:

A cylinder fitted with a movable piston contains ideal gas at 27 degrees C, pressure 0.50*10^5 Pa, and volume 1.25 m^3. What will be the final temperature if the gas is compressed to 0.80 m^3 and the pressure rises to 0.82*10^5 Pa?

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