100w heats up 10g of water how fast?

[Reefer_Madness]

I am building a mixing station.  How fast do you think a 100w heater would heat up 10g of room temperature water to 79 degrees?  The reservoir has a power head so there will be circulation.  I am asking because I am going to put timers on my system.  I could just test it, but I would like to have a starting point to test my timers.

 

Any ideas?

 

Ben