What are some sources of error from 10AL Moorpark College Physics Procedure Part

Question

What are some sources of error from 10AL Moorpark College Physics Procedure Part 2 1. Fill the steam generator with about 2/3 deionized water and plug in the generator. Let the water start to heat while you complete the following steps. 2. Weigh the inner aluminum cup of your calorimeter and enter the mass in the space below Also weigh an aluminum sample supplied by the professor and enter its mass in the space below grams 3. Fill the inner cup with enough room temperature deionized water to cover the aluminum sample and weigh the cup+ water. Enter the combined mass and the mass of just the water in the spaces below: Assemble the calorimeter grams m ser grams 4. When the water in the steam generator is boiling, suspend the aluminum sample below the surface of the water either using fishing line or the heating cup that comes with the steam generator. Allow several minutes for the sample to be heated to 100 oC. Measure the initial temperature of the water in the calorimeter cup and enter the initial tempera- ture in the space below. 4.03 cuf oC 5. Carefully transfer the heated sample of aluminum into the inner calorimeter cup-don't splash any of the water out of the cup. Allow a few minutes for the mixture to come to an equilibrium temperature and record that temperature in the space below. 34.4 T, findl Analysis Part 2 Either in lecture or lab your professor will have gone over the "method of mixtures" tech nique heated sample are made of aluminum. Use the general formulas, for determining specific heats. In this case both the inner calorimeter cup and the Q mC (At) and Q fort by gample goined by ters cop to find the specific heat of aluminum. Show your work on the next page. Page

Explanation / Answer

In this problem we are multipl,ying three quantities m, C, dT for finding the value of Q.

The percentage error in Q is equal to the sum of percentage errors of individual elements. Here C is considered as accurate as it is universally accepted value which is the specific heat.

Now we have instrumental errors in measuring the mass as well as temperatures which cntribute to the error in Q value.

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