Question

A 14 g block of metal (Cs = 126) heated to 78 is plunged into 405 g of water at 24 degree C. What is the equilibrium temperature? Cs of water is 4190 Jkg-1K-1. Give your answer to 1 decimal place

Answer 1

Answer on Question #49017 – Physics – Mechanics | Kinematics | Dynamics

1. A 14 g block of metal (Cs = 126) heated to 78 is plunged into 405 g of water at 24 degree C. What is the equilibrium temperature? Cs of water is 4190 Jkg-1K-1. Give your answer to 1 decimal place.

Let evaluate the quantity:

$$T = \frac{0.014 \cdot 126 \cdot 351.1 - 0.405 \cdot 4190 \cdot 297.1}{0.014 \cdot 126 - 0.405 \cdot 4190} = 297.0(K) = 23.9(^0 C).$$

Answer: 23.9\,^0 C.

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