Calorimetry Pre lab Question. (purpose for this lab : Determination of a calorim

Question

Calorimetry Pre lab Question.

(purpose for this lab :

Determination of a calorimeter constant for two nested styrofoam cups.

Determination of the specific heat of metal.)

1. What is the unit of heat convenient for work with water in this experiment? [Hint: it's not J]

2. Why is it helpful to heat the tubes of water and the tubes with the metal as the water heats rather than wait until the water is boiling to put these in?

3. What is the enthalpy(heat) change in calories for 32.00 grams of water at 21.6 °C when the temperature of the water changes to 34.6 °C?

4.Assume that the water was in a container that is known to gain just 1 cal/°C, its "Ccal", how much heat did the container gain assuming it also was initially 21.5°C and rose to 34.4°C?

5. Summing the heat gained in #3and #4, what is the total heat gained?

6. Assuming that the heat absorbed by the water and its container, summed in #5 was due to heat release by 50.000 g of metal that was initially at 100°C and cooled to 34.6°C, calculate the calories per gram-°C for the matal, that is its specific heat in cal/g°C.

Help me please

Explanation / Answer

Ans 1 .

Unit of heat convinient to work with water is Calorie.

1 Calorie = 4.184 Joules

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