Determine which law is appropriate for solving the following problem. what temperature will 215 ml of a gas at 20°c and 1 atm pressure attain when it is subject to 1.5 atm of pressure? what law is used: combined gas law, charles law, or boyles law?

The Combined Gas Law

Explanation:

Let’s compare the two conditions.

p₁ = 1     atm; V₁ = 215 mL; T₁ = 20 °C

p₂ = 1.5 atm; V₂ = 215 mL; T₂= ?

The only variables are pressure and temperature.

The most appropriate law would be Gay-Lussac’s Law (p₁/T₁ = p₂/T₂), but that’s not an option.

The only other option involving p and T is the Combined Gas Law:

p₁V₁/T₁ = p₂V₂/T₂

Since V₂ = V₁, we can write

p₁V₁/T₁ = p₂V₁/T₂     Divide both sides by V₁

    p₁/T₁= p₂/T₂         Multiply both sides by T₂

p₁T₂/T₁ = p₂               Multiply both sides by T₁

    p₁T₂= p₂T₁            Divide both sides by p₁

      T₂ = T₁ × p₂/p₁

Now, convert your temperature to kelvins, insert the values into the formula, and calculate the new temperature.

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