contestada

A gas at 89 degrees C occupies 125.7mL at 123.3kPa. What volume does it occupy at 25 degrees C and 100.9kPa?

Respuesta :

we can use the combined gas law equation

this shows the relationship between pressure, volume and temperature for a fixed mass of gas.

[tex]\frac{P1V1}{T1} = \frac{P2V2}{T2}[/tex]

P1 is pressure, V1 is volume and T1 is temperature in Kelvin for the first instance

P2 is pressure, V2 is volume and T2 is temperature for the second instance.

Temperature is given in °C we have to convert it to Kelvin

T1 is - 89 °C + 273 = 362 K

T2 is - 25 °C + 273 = 298 K

substituting the given values in the equation

[tex]\frac{123.3 kPa * 125.7 mL}{362 K} = \frac{100.9 kPa *V2 }{298 K}[/tex]

V2 = 126.4 mL

the final volume is 126.4 mL