A5.00 l air sample has a pressure of 107 kpa at a temperature of -50.0 c. if the temperature is raised to 102 c and the volume expands to 7.00 l, what will the new pressure be

You have to use the combined gas law (P₁V₁/T₁=P₂V₂/T₂) and solve for P₂ to get P₂=P₁V₁T₂/T₁V₂.

You need to convert all of the temperature values into terms of Kelvin so -50°C turns into 223K and 102°C turns to 375K.  After you make that conversion you can just plug in all of the values into the idea gas law and you should get P₂=228.5kpa.

I hope this helps.  Let me know if anything is unclear.

The new pressure would be 128.5 kPa

Explanation:

We need to use the combined gas law to solve this problem:

But before using this equation we must convert °C into K.

-50.0°C = 223.16 K102 °C = 375.16 K

Then we put the data in the equation and solve for P₂: