Multiple choice

If water of mass 20 g at $ 0:^oC$ is mixed with 40 g of water at $ 10:^oC$, then the final temperature of the mixture is $ 10:^oC$

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Mixing 20g at 0C and 40g at 10C will result in a final temperature between 0 and 10C, not 10C itself, due to the heat exchange required to reach equilibrium.

AI explanation

To find the final temperature of the mixture, apply the principle of calorimetry using the formula mass times specific heat times temperature change. Equating the heat gained by the colder water to the heat lost by the warmer water gives 20 g * (T - 0) = 40 g * (10 - T). Solving the equation 20T = 400 - 40T results in 60T = 400, which means the actual final temperature is 6.67 degrees Celsius; therefore, the claim that the final temperature is 10 degrees is incorrect. The statement is false.

Keep practicing — related questions