![]() ![]() Obtain a baseline temperature of the water. Window, click Save to begin recording data. (you should be able to see the shaft rotating). Water to determine the mass of water from the volume and record the Theĭensity of water at 25C is 0.998 g/mL. The calorimeter has been filled with 100 mL water. Pick up the Al sample from the balance pan and place the sample in Of Al in the data table below, and return to the laboratory. ![]() Small to read click on the Balance area to zoom in, record the mass Start VirtualĬhemLab, select Thermodynamics, and then select Specific Heat of Alįrom the list of assignments. Measure the specific heat of aluminum (Al). In this experiment, you will use a simpleĬalorimeter and your knowledge of the specific heat of water to In comparison with the specific heats for other materials, such asĬoncrete or metals. Water,įor instance, has a specific heat of 4.18 J/Kg. Specific heat capacity or specific heat of that substance. The temperature of 1 g of a substance by 1 degree is called the That it takes more heat to raise the temperature of some substances This may seem strange since the water and concreteĪre being heated by the same source-the sun. ![]() While the concrete around the pool may become too hot to walk on Sunny day, the water in a swimming pool may warm up a degree or two Try to get as small of a slope as possible - your y-intercept is your temperature reading: If you line is not horizontal you might introduce an error.īeyond Labz, all rights reserved 3-3: Specific Heat of Al On a Important Hints to perform the experiment: Set data collection to 30 min (it won't take that long, but you don't want the data collection to stop during the experiment): Make sure you collect data point at least once every 10 seconds (6 or more data points per minute) Determine the mass of water (dilute HCI) as in previous experiments by difference_ Make sure you record the precise mass of solid reactant: Start collecting data for about 1 minute to establish a straight baseline for your initial temperature before adding the solid reactant: Try to get as much of solid reactant into calorimeter a5 possible while continuing to collect data_ Make sure you stir well, otherwise you will get a wavy plot and have to repeat the experiment: After the temperature has increased and starts to settle try to get minute worth of a fairly straight line To determine Ti and Ti you will have to fit the straight line before and after addition of the solid reactant using a linear fit. …įor both reactions B and C, you will need to know the exact mass of_HCLand Mg or MgQ: The " temperature will be monitored using the Logger Pro program: Plug the temperature probe into the Vernier box, which plugs into the computer. Try to get as small of a slope as possible - your y-intercept is your temperature reading: If you line is not horizontal you might introduce an error. Important Hints to perform the experiment: Set data collection to 30 min (it won't take that long, but you don't want the data collection to stop during the experiment): Make sure you collect data point at least once every 10 seconds (6 or more data points per minute) Determine the mass of water (dilute HCI) as in previous experiments by difference Make sure you record the precise mass of solid reactant: Start collecting data for about 1 minute to establish a straight baseline for your initial temperature before adding the solid reactant: Try to get as much of solid reactant into calorimeter a5 possible while continuing to collect data Make sure you stir well, otherwise you will get a wavy plot and have to repeat the experiment: After the temperature has increased and starts to settle try to get minute worth of a fairly straight line To determine Ti and Ti you will have to fit the straight line before and after addition of the solid reactant using a linear fit. Your set-up is the same as it was for part A, except substitute the temperature probe for the thermometer: Repeat each run 2 timesįor both reactions B and C, you will need to know the exact mass ofHCLand Mg or MgQ:įor reaction (B) you should use 100.0 mL of 1 M HCI and 0.07 g of Mg For reaction (C) you should use 100.0 mL of 1 M HCl and.25 g of Mgo When you want to acquire data you click on the start button (green arrow): When you are finished collecting data set click stop (red square) You should be collecting data for the entire run for each trial: time: The program is now ready for data acquisition: Turn on the computer and open Logger Pro: If the temperature probe is properly connected, you will see a screen labeled Temperature Vs. ![]()
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