Section 14.5 (# 8)  If 500 g of brass at 200 degrees C and 300 g of steel at 150 degrees C are added to 900 g of water in an aluminum pan of mass 150 g both at 20 degrees C, What is the final temperature? (assuming no loss of heat to the surroundings) according to the table: Specific heat of Brass is 0.092 cal/g oC, of steel is 0.115 cal/g oC, of aluminum is 0.22 cal/g oC, and of water is 1.00 cal/g oC FIRST state which material gainned heat and which material loses heat. THEN write the general equation - THEN - PLUG IN values - BEFORE doing any algebra. The goal is to not solve the mixure problem algebracialy and then plugging in the values.

Principles of Physics: A Calculus-Based Text
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ISBN:9781133104261
Author:Raymond A. Serway, John W. Jewett
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Chapter16: Temperature And The Kinetic Theory Of Gases
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Section 14.5 (# 8) 

If 500 g of brass at 200 degrees C and 300 g of steel at 150 degrees C are added to 900 g of water in an aluminum pan of mass 150 g both at 20 degrees C, What is the final temperature? (assuming no loss of heat to the surroundings)

according to the table: Specific heat of Brass is 0.092 cal/g oC, of steel is 0.115 cal/g oC, of aluminum is 0.22 cal/g oC, and of water is 1.00 cal/g oC

FIRST state which material gainned heat and which material loses heat. THEN write the general equation - THEN - PLUG IN values - BEFORE doing any algebra. The goal is to not solve the mixure problem algebracialy and then plugging in the values. 

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