Answer :
Final answer:
The final volume of the mixed water remains 60 mL, with the final temperature averaging at 35 degrees Celsius. The cold water's temperature increases by 20 degrees while the hot water's temperature decreases by 20 degrees. The kinetic energy of the particles in the hot water decreases as it cools down and increases for the cold water as it heats up.
Explanation:
A.) The final volume of the water is simply the sum of the volumes of two water samples, so it remains 60 mL as water is incompressible and doesn't change volume when mixed.
B.) The final temperature of the water can be calculated assuming no heat is lost to surroundings. As the masses (and volumes) of hot and cold water are equal, heat lost by hot water is equal to the heat gained by cold water. Therefore, final temperature will be the average of two initial temperatures, i.e., (15 + 55) / 2 = 35 degrees Celsius.
C.) The cold water increased by 20 degrees (from 15 to 35 degrees Celsius).
D.) The hot water decreased by 20 degrees (from 55 to 35 degrees Celsius).
E.)& F.) The heat energy transferred depends on the specific heat capacity of the water, which is required to calculate an absolute value. We could calculate it if that was provided.
G.) The kinetic energy of the particles in the hot water decreases (as it cools down) and for the cold water, it increases (as it heats up).
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