Lab 4 - Calorimetry Lab

Lab 4 - Calorimetry Lab - CALORIMETRY Saddleback College...

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7/07 1 CALORIMETRY Saddleback College Physics Department Purpose (A) To predict the final temperature of a mixture of hot and cold water and compare it to the actual value. (B) To calculate the specific heat of a metal sample and compare it to the handbook value. (C) To calculate the latent heat of fusion of ice and compare it to the handbook value. Theory Speedometers measure speed, voltmeters measure voltage and accelerometers measure acceleration. In this experiment you will use a device called a calorimeter. The name suggests that it measures a quantity connected with heat since the calorie is a unit of thermal energy. Unfortunately, the amount of thermal energy present in an object cannot be measured as directly as some of the other quantities mentioned above. The textbook discusses the transformation of energy from one form to another; e.g. from mechanical energy to thermal energy, from chemical energy to thermal energy to mechanical energy, and so on. In this experiment you will investigate some of the properties of thermal energy in transit or heat . You will measure the heat absorbed or given off by a substance by observing the change in temperature of a standard substance. The calorimeter you will use is simple and consists of an insulated container in which measured quantities of materials can be mixed together without an appreciable amount of heat being gained from or lost to the environment. You are to make several assumptions about the nature of heat, then, use those assumptions to predict what will happen when you mix two samples which are initially at different temperatures. If your prediction is correct, then you can feel somewhat confident in your assumptions, until they lead to a prediction that turns out to be wrong. Assumption One: (Zeroth Law of Thermodynamics):
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This note was uploaded on 10/05/2011 for the course PHYS 4c taught by Professor Parsons,b during the Fall '08 term at Saddleback.

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Lab 4 - Calorimetry Lab - CALORIMETRY Saddleback College...

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