How can I calculate evaporation at a constant temperature?

Hi all!

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How can I calculate the evaporated mass/time unit? For example. I have a vessel at 120 degree celsius with xyelene in it. How can i calculate the evaporated mass/sec? I just use latent heat of vaporization? I mean m = Q/DeltaHvap?

With numbers...

Q = 100,000 Watt.

DeltaHvap of Xylene =36 kJ/mol

m = 100,000W / 36000J = rougly 2,9 kg/sec?