Association of Energy with System Within an Endothermic and Exothermic Reaction

 Association of one’s with System Changes in an Endothermic and Exothermic Reaction Essay

Calorimetry Lab

Calorimetry Research laboratory


The objective of this lab is to use the calorimetry to ascertain how energy is associated with a system changes in an endothermic and exothermic reaction and to use this details to calculate molar enthalpy of various salts. Hypothesis:

I hypothesize that whenever water can be added to the ammonium nitrate the temperature of the natural environment will reduce and when water is put into the calcium supplements chloride the temperature from the surroundings will increase. Materials

Equipment: Reagents:

* Styrofoam glass ammonium nitrate

* managed to graduate cylinder calcium chloride

* electronic balanceВ

* thermometerВ

* regular faucet water

* 100ml beaker x2

Materials not really used: none

Materials that had been used however, not listed: none


1 ) Put on security goggles and aprons

2 . Evaluate 100ml inside the graduated tube. Transfer the to the Styrofoam cup and record the original temperature in the waterВ three or more. Weigh effectively 3g of NH4NO3 to the water make the top onto the cup. Gently and continuallyВ stir the solution with the thermometer. four. With constant observation with the temperature until it remains continuous for about 15-20 seconds. Record the final temperatureВ 5. rinse your cup, dry out it thoroughlyВ

6. Repeat steps 1-5 of the experiment using 3-g of calcium supplements chloride in place of ammonium nitrateВ Steps certainly not used: none of them

Changes to the lab: did not carefully stir the answer with the thermometer because it experienced no room to move in the styrofoam glass. Instead the calorimeter was gently shaken to dissolve the chemicals. Chemical substances and their dangers:


Ammonium nitrate forms a mild acidity when mixed with water. This acid could cause irritation towards the eyes, nostril, and skin. Inhalation of high concentrations of ammonium nitrate dust could cause respiratory tract irritation CaCl2

Calcium mineral chloride might cause skin irritation and possibly burns up, especially if normal water is present. In...


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