how long would it take for 1.50 mol of water at 100C to be converted completely into steam if heat were added at a constant rate of 18.0J/s?

Answer 1

How much energy do you need to make the conversion?
1.50 mol x 18g/mol = 27 g H2O
q = 27g H2O x 2259 J/g = about 60,999 J.
18.0 J/s x ?s = 60,999 J.
Solve for s.

Answer 2

3.39

Answer 3

42.2 min :)