# If 3 L of a gas at room temperature exerts a pressure of 7 kPa on its container, what pressure will the gas exert if it the container's volume changes to 2 L?

Feb 8, 2016

${P}_{2} = 10 , 5 k P a$
${P}_{1} \cdot {V}_{1} = {P}_{2} \cdot {V}_{2}$
$7 \cdot 3 = {P}_{2} \cdot 2$
$21 = 2 \cdot {P}_{2}$
${P}_{2} = \frac{21}{2}$
${P}_{2} = 10 , 5 k P a$