Question

5 kg of water at $30^{\circ}C$ is mixed with 4 kg of water at $85^{\circ}C$. The final temperature of the mixture is:

• A. 330.59 K
• B. 303.15 K
• C. 327.59 K
• D. 372.59 K

Hint:

In mixture problems where the substance is the same (like water), the final temperature is simply the weighted average: $T_f = \frac{m_1 T_1 + m_2 T_2}{m_1 + m_2}$. This is a huge time-saver!

Answer 1

The Correct Option is C