Determining Best Calorimeter Experiment

29. When the thermometer reads 40°C, carry the beaker out of the heating apparatus with a beaker tong.

11. The experiment was repeated three more times using different water temperatures (room temp water, cold temp water, hot temp water).

2) Heat one to about 50˚C, and place other one in calorimeter (at around 20˚C)

Place the beaker on the hot plate, place the thermometer in the beaker and set the hot plate to 5oC.

4.Measure 35mL of warm water and add them into each of the 4 test tubes at about roughly the same time. It is essential that the water is warm. Do not seal the test tube.

Rinse out beaker and dry it, preparing for next trial. Also reset stopwatch. Repeat steps 10-16 two more times until you have completed three trials in total. Measure the temperature of the hot water in celsius and record it to ensure consistency in temperature throughout the experiment.

Task 1 Hypothesis By increasing the mass of substance using 20ml of water starting at room temperature there will be 10oc change, either an exothermic change or an endothermic change. Aim The aim of this investigation experiment is to find out what mass of substance is required for an exothermic or endothermic substance to achieve a 10oc temperature change. Set objectives • 7 masses of each substance should be used in this experiment: 0g, 0.25g, 0.50g, 0.75g, 1.00g, 1.25g, 1.50g, 1.75g, and 2.00g. • Measure the start and end temperature for each substance using a thermometer.

First, get a hot plate and scale, and plugged them in, and turned them on. Then, get a thermometer to measure the temperature of the water. Then, get a 25 ML beaker. After that, measure the beaker on the scale before adding water. Then, fill the beaker up with water and measured it. After, add 6 scoops

Insert a thermometer into the designated hole on the lid, and into the water chamber opening.

The temperature of the product was monitored. The product was observed for one minute. At station 8, the temperatures of the HCl and sodium hydroxide (NaOH) were measured. Five milliliters of NaOH were placed in the test tube. Five milliliters of HCl were added to the test tube.

Slide the vial into the water in the calorimeter and place the lid on top. Stir the water and continue recording temperature versus the time for a minimum of 20 minutes. If the rate of cooling remains constant for 7 minutes and the temperature is at least 2.5 degrees celsius below the maximum recording, recording can be stopped. Remove the temperature probe and vial. Dry the vial and record the mass of the vial with the lid and the

The heat of combustion produced increases the temperature of the calorimeter system. About 10 to 15 minutes after ignition the heat exchange between the calorimeter bomb and the water surrounding it in the inner vessel is completed. The temperature rise is then measured and serves to calculate the gross calorific value Ho. This calculation is possible only if under the same test conditions the heat capacity C of the adiabatic system has been determined previously by burning a reference

The initial temperature of the water was recorded with a thermometer so a change in temperature could be determined. This probe was then placed in the sandwich bag while sealed to observe the temperature inside the assumed calorimeter.

Use the measuring cylinder to get 1.5ml water and pour it into a test tube

Compare the experimental results obtained from the hand-held thermometer and the digital prove with the theoretical overall enthalpy of solution.