Heat is energy transferred from one object to another due to a difference of temperature between the two objects. To predict final temperature of mixed water at two different temperature, use the following two equations. Qc = -Qh Heat entering to a cold object = - heat leaving from a hot object. Minus sign indicates that heat leaves from hot object. Q= mcT T: change in temperature (Tf - Ti) Heat = mass (specific heat capacity)(change in temperature) Specific heat of water = 4.2J/goC Ex) 150g of water at 60oC and 150g of water at 30oC is mixed. What is the final temperature of mixed water