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Chemistry Ia - Measuring Heat Capacity of your Cup

 Essay upon Chemistry Ia - Testing Heat Potential of a Cup

IB Chemistry Evaluation

Sami Nidal Mroue

12 months 12 JRF

Heat Potential of a polyurethane foam cup

Launch

This is a great experiment to look for the heat potential of my personal foam (styrophome) cup We would be using pertaining to other tests during the college year. To achieve this the temp of a regarded mass of cold drinking water was put into the glass and the equivalent water heated and had the temperature observed. The hot normal water was added into the cup and the fresh temperature examining noted. Then the equation Queen = meters. c. ∆T is put on find heat capacity of the cup. Aim

To determine the temperature capacity of any styrophome cup (calorimeter). 3rd party Variable: Heat change pertaining to the chilly and hot water. Dependent Varying: Heat ability of the glass

Controlled Variables: Mass of water employed (25ml = 25g)

Temperature Capacity of water (constant)

Hypothesis

It can difficult to anticipate what the high temperature capacity will be but the warmth capacity that may be to be found has to be over 0ºC. The answer definitely cannot be in the negative because that would show that the cup is the a single giving out warmth and vice versa and has to end up being over 0ºC because it is increasing heat.

Technique

Apply a mass of 25g of cold water to the glass and make a note of its temp reading by sticking a thermometer in to the cup (the cup could be made more stable and better protected by fitting it into a beaker). The mass from the water is measured simply by filling a measuring tube with 25ml of normal water (1ml=1g) after that heat the same amount of water to a temperature of approximately 50ºC within a beaker resting on a tripod stand which has a Bunsen burner and dump it over the cold water, stir which has a stirring fishing rod and take note the temperature change. A cloth could possibly be used to lift the hot beaker. Repeat the experiment 3 times or to obtain reliable and consistent results. After saving the data, for each experiment find the difference in temperature involving the mixed and cold drinking water temperatures and also for the mixed as well as the hot water temperature ranges. Whenever taking temperatures a thermometer must obviously be taken and placed into the water. Now the equation Queen = meters. c. ∆T can be utilized after broadening into mh. ch. ∆Th = mc. cc. ∆Tc + mcup. ccup. ∆Tcup. N. M. the heat capability of the glass = mcup. ccup

Equipment used thermometer

beaker

A styrophome (foam) cup calculating cylinder thermometer A thermometer (-10 to 100ºC)

Beakers (50ml+) cuphot water

Calculating cylinders (25ml ±1ml)wire gauze

A Bunsen burner water Bunsen burner A tripod stand

Line gauze beakerTripod stand Suits

A material (to hold the hot beaker)

Waterstirring fly fishing rod

Stirring fly fishing rod

Controlling the factors

Independent factors:

The temperature from the cold water I used was the regular temperature scored in the room temperature, the temperature could be dropped by using chilly refrigerator water or adding an snow block before the temperature drops to the ideal marked. The temperature from the hot water My spouse and i used was 50ºC for a lot of experiments. I put 25ml of drinking water into a beaker and heated up it with the thermometer submerged. When the heat got to 50ºC I eliminated the beaker of the tripod stand. The temperature could rise a little over the 50ºC mark and then I allowed it to cool until it finally was 50ºC again ahead of I put the water in to the cup.

Handled variables:

Mass of the normal water used for the cold and hotter water was 25g. The total mass of the normal water in the cup was 50g. The water mass did not have to be weighed to get 1g of water equivalent 1ml of water. A 25ml calculating cylinder was used for this. A 25ml of water would be filled towards the mark and poured in the cup and another...

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