Question

In: Physics

1. The calorimeter consists of two cups, separated by an insulating ring (see Figure 1). What...

1. The calorimeter consists of two cups, separated by an insulating ring (see Figure 1). What is the purpose of having two cups? The calorimeter consists of two cups, separated by an insulating ring (see Figure 1). What is the purpose of having two cups?

2. Only one of the cups is used in the calculations. Which one and why?

3. 200 grams of tin at 100 ^oC is dropped into a calorimeter cup containing 43.0 g of water. The calorimeter cup has a heat capacity of 29 J/K. Both the calorimeter cup and the water are at thermodynamic equilibrium and have an initial temperature of 30.0 ^oC. Calculate the new equilibrium temperature. The specific heat of tin is 218 J/kg.K. Show all working.

Expert Solution

1) The inner cup acts as a container for substances which exchange heat. To prevent the outer surface of the inner cup from transferring heat to the surroundings, the outer cup along with insulating material is used. The insulating material is air to prevent the heat losses through conduction.These are the reasons why we use two cups.

2) Inner cup must be included in calculations. Since the inner cup absorbs some heat from substances inside it , it must be included in calculations.

3)

Heat gained by calorimeter and water = Heat lost by tin

New equilibrium temperature is

genius_generous answered 2 years ago

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