Question

2. In the mixing process you analyzed, the inner calorimeter cup started how many degrees below room temperature and ended how many degrees above room temperature? Explain why using water from the water cooler, rather than tap water (or hot water or ice water or water from a bottle in your backpack) is a good choice for an accurate experiment. 3. Suppose that a student stirs the calorimeter very zealously, rather than gently, in step 5. Suppose the student exerts an average force of 2.20 N as he pushes and pulls the stirring rod up nd down, over a total distance of 500 cm, but does not splash any water or pellets out of the up. What effect would this action have on the equilibrium temperature he measures?

Answer 1

Rate of energy is equal to power energy required to charge the Temperature for water and that is Q = Q_1 + Q_2 = M_w C_w delta T_w + M_AL C_AL delta T_AL = (98.39) (1) (29 . 22 degrees c) + (609) (0.216) (29 - 90) = -688.1 cal + 790.56 = 102.46 cal = 428.69 J rate of energy Q/E = 428.69 J/85 = 53.58 w physicall Quantity is power with units watt.