Question

1. A volume of carbon dioxide gas, CO2, equal to 25.0 L was collected at 23 0C and 98.9 kPa.  What would be the volume of carbon dioxide if it were collected at 23 0C and 83.0 kPa?

Answer 1

$P_1=98.9kPa$

$V_1=25.0L$

$T_1=23+273=296k$

$P_2=83.0kPa$

$T_2=23.0+273= 296k$

$V_2=?$

Note that temperature is constant

Hence suitable formulae is

${P_1×V_1}={P_2×V_2}$

$98.9×25=83.0×V_2$

$V_2=\frac{98.9×25}{83.0}=29.79L$