Calculate the volume occupied by 18g of water vapor at 100c and 1 atm

water-vapor

#1

calculate the volume occupied by 18g of water vapor at 100c and 1 atm

Answer:

For this problem, the gas law formula
PV=nRT must be used where P is pressure, V is volume, n=number of moles, R=gas constant and T is temperature.
Since volume is asked, rearrange the formula so it will become
V=nRT/P .
R=0.08205 L-atm/K-mol so convert the 18g to mole and 100c to Kelvin first.
18g/(2.02+16)g/mol=1mol and 100celsius+273K=373Kelvin…substituting it to the formula,
V=((1mole water)0.08205x(373K))/1atm=30.60465L