1. The problem statement, all variables and given/known data T1= 20C T2=80C Power=2kW Volume= 10liters 2. Relevant equations Q= Power x time Q= m x c x DELTA Temp 3. The attempt at a solution Do I need another equation to be able to find the heat? Since I have the equation of the heat I have the mass and I have the temperature but the c I don't have it. I then can use the Q/P = t, to find t. What's the c exactly?