Water heating up with a gas burner

Water heating up with a gas burner :

Materials:

Gas burner
1l water
Thermometer
Clock

First we weighed the burner.
The weight of the burner was 374.54

Work procedures:
We warmed up the water with the gas burner and at the same time examined we with the thermometer per minute the temp. These values will label themselves we and considered themselves which them for us meant.

2.Evaluation : Our values resulted in that after nine times measure the temp. and short waiting the temp. sank. Subsequently, we again weighed and tightened the burner that there was a decrease in weight of 5.90g with the burner and that the Wasssertemp. around 62°C. had risen.

3.:Tasks We had to compute the task the thermal capacity of water.
In addition some values were given: Calorific value of butane/propane (contents of the burner) Thus we could durschnittl. Energy consumption of 50 mJ/Kg compute.

Weight loss of the burner 5.90g.

Weight of the water 1000g. Temperature increase in K 62K.

The formula of the thermal capacity: Heat energy /Gewicht * temperature difference
Formula of the heat energy: Energy consumption was warmed up * weight of the burned material /Gewicht of the material
Heat energy of the burner: 0.295 mJ Thermal capacity of water: 0.295mJ/1000g*62K =18.29 J/g*K If one checks now in a book, one will notice that our value is not correct.

Reasons for wrong value:
Burner does not pass the whole heat energy on to the water
Measuring error

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