Title: Temperature of Mixed Water Objective: You will measure final temperature of mixed water at two different temperatures. Apparatus: beaker, Styrofoam cups, hot plate, thermometer, graduated cylinder, disposable plastic dropper, triple beam balance, Background theory: 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. Qe =-Qn Heat entering to a cold object = - heat leaving from a hot object. Minus sign indicates that heat leaves from hot object. Q= mcAT AT: change in temperature (Tr T;) Heat = mass (specific heat capacity)(change in temperature) Specific heat of water = 4.2J/gC Ex) 150g of water at 60C and 150g of water at 30C is mixed. What is the final temperature of mixed water? Heat entering cold object = - (heat leaving hot object) Qc =-Qn Q= mcAT 150g(4.2)(Ts 30) = -150g(4.2)(Tr 60) Ti30 =- (T 60) 2Tf=30+60 =90, 2Tr=90 Tr=45C