Question

9) A lab assistant pours 330 g of water at 45°C into an 855-g aluminum container that is at an initial temperature of 10°C. The specific heat of aluminum is 900 J/kg K, and that of water is 4186 J/kg K. What is the final temperature of the system, assuming no heat is exchanged with the surroundings? A) 35°c 9) B) 28°C C)32°C D) 33°C

Answer 1

Here ,

let the final temperature of mixture is Tf

330 * 4.186 * (45 - Tf) = 855 * 0.900 * (Tf - 10)

solving for Tf

Tf = 32.47 degree = 32 degree C

the final temperature is 32 degree C option(C)