$1.$ What is the experimental latent heat of vaporization of water? hfg $($experiment$)=$

collected data:

Initial water mass $($g$)=400\mathrm{.}6$g

Power of the heater $($Watt$)=1500$W

Running time $($starting from boiling point till specific amount of water evaporated$)($s$)=117$s

Final water mass $($g$)=394\mathrm{.}7$

Mass of evaporated water $=5\mathrm{.}9$g