Please help me answer this questions its due in a few hours and i understand abs

Question

Please help me answer this questions its due in a few hours and i understand absolutley nothing. I attached the data tables, procedures that were done in lab and the data analysis questions.

Procedure 1. Procure an aluminum cylinder that is 2cmX 1.25 cm diameter. Find the weight of the cylinder and enter in the data table 2. Put 150ml water in a 250 ml beaker ad place on a hot plate and war up with knob to 10 i. Put the cylinder in the hot bath and let boil for 5 minutes while the rest of the experiment is being set up ii. The cylinder should be completely covered 3. Use the figure given to set up the coffee cup calorimeter. Weigh the two coffee 4. Add in 40ml of water and weigh Use a plastic pipet to remove and add water until there is about 40 grams 5. Put the Calori on the magnetic stirrer. Only use the magnetic stirrer and not meter the hot plate. Cover and stir while rest of experiment is being set up. 6. Turn on the SPARKS SYSTEM and connect the probe. 7. Construct a new experiment a. The item should be on the y-axis and time on the x axis. There perature should be a digits read out of the 8. Read the temperature of the hot water bath with the temperature probe. 9. When the temperature stays constant stop recording and cool the probe with room temperature water. 10. Begin collecting data. The initial temp. Should be taken 15.20 seconds after the probe has been placed in the calorimeter.

Explanation / Answer

The heat energy(q) contained in the aluminium cylinder is not the same for all experiment.

Foe T1 heat=m*s*t where m=mass of the substance s=specigfic heat and t=temperature rise

=40.337*1*4.5 cal=181.51 cal

For T2 heat =45.270*1*4.3 cal=194.66 cal

For T3 heat=49.799*1*3.2 cal=159.35 cal

3. The temperature change for R1, R2 and R3 respectuvely are 4.5 deg C, 4.3 deg C and 3.2 deg C. The first two values are close but 3rd one is differene.

If same mass of water is taken the the temperature rise should be the same.

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