Alkanols Heat of Combustion
Goal: To determine the molar heat of combustion of methanol, ethanol and 1-propanol
3 heart burners, a single containing methanol, one made up of ethanol and one containing 1-propanol. A thermometer
A copper calorimeter
100 cubic centimeters measuring canister
Retort stand and clamps
This experiment includes flammable elements remove loose clothing including ties which could be set alight. Wear safety spectacles!
Ensure equipment placement is secure and does not threat nearby students.
1 . Build the test as displayed in the diagram below.
2 . Measure exactly 100 milliliters of water using the testing cylinder and carefully put it in the Copper calorimeter. Put the thermometer in the normal water to measure the temperature in the water. several. Weigh the spirit burner and record the mass
4. Record the temperature of the water inside the Copper calorimeter. 5. Pull the limit off the soul burner and lightweight the material wick recalling to start the stopwatch as soon as the wick lamps 6. Record the temperature of the water after 1, two and 3 minutes, at 4 minutes replace the cap around the spirit burner. 7. Reweigh the burner and record. Start test again in step 2 having a different alkanol. Each alkanol should be examined at least 3 times.
MethanolTest OneTest TwoTest Three
Mass before (g)299. 34298. 34296. 93
Temperatures Before (°c)232423
After you Minute (°c)303329
After two Minutes (°c)374139
After 3 Minutes (°c)434849
Mass after (g)298. 34297. 29295. 99
EthanolTest OneTest TwoTest Three
Mass before (g)276. 78275. 04273. 86
Temperatures Before (°c)232323
After 1 Minute (°c)293233
After two Minutes (°c)404446
After 4 minutes (°c)535558
Mass after (g)275. 42273. 86272. 63
1-PropanolTest OneTest TwoTest ThreeTest Several
Mass ahead of (g)189. 63187. 64186. 08184. 81
Temperatures Before (°c)232423...