Energy of Nuts - a Calorimetry Experiment
Procedure 1: Energy of a cashew.
Recorded Data: | Trial 1 | Trial 2 | Trial 3 | Trial 4 | Trial 5 | Mass of cashew (in grams) | 1.00 g (± 0.01 g) | 1.00 g (± 0.01 g) | 1.70 g (± 0.01 g) | 1.40 g (± 0.01 g) | 1.50 g (± 0.01 g) | Mass of remaining material (in grams) | 0.60 g (± 0.01 g) | 0.30 g (± 0.01 g) | 0.30 g (± 0.01 g) | 0.50 g (± 0.01 g) | 0.80 g (± 0.01 g) | Mass of cashew that burned (in grams) | 0.40 g (± 0.01 g) | 0.70 g (± 0.01 g) | 1.40 g (± 0.01 g) | 0.90 g (± 0.01 g) | 0.70 g (± 0.01 g) | Volume of liquid water (in mL) | 59 mL | 54 mL | 104 mL | 31 mL | 15 mL | Mass of liquid water (in grams) | 59 g | 54 g | 104 g | 31 g | 15 g |
Calculations:
The mass of a particular amount of a substance is equal to the product of the volume of that amount and the density of the substance.
Mass = Volume x Density
The density of water is 1.0 g/cm3, so it is assumed that the volume of water in mL will be equal to the mass of the water in g.
1 mL H2O = 1 g H2O
For example, in trial 1,
Volume of liquid water = 59 mL * Mass of liquid water = 59 g
Observations: 1. While the cashew was burning, the flame barely rose above the nut. 2. The cashew burned for a long duration of time (about 2 minutes). 3. The cashew was completely black (charred) and brittle after it was entirely burnt.
Processed Data: | Trial 1 | Trial 2 | Trial 3 | Trial 4 | Trial 5 | Heat produced by the burning cashew (in cal) | 4720 cal | 4320 cal | 8320 cal | 2480 cal | 1200 cal | Heat produced by 1 gram of cashew (in cal) | 11800 cal | 6171.43 cal | 5942.86 cal | 2755.56 cal | 1714.29 cal | Kilocalories of heat from 1 gram of cashew | 11.80 kcal | 6.17 kcal | 5.94 kcal | 2.76 kcal | 1.71 kcal |
Note: All decimal values are approximated to two decimal values.
Calculations:
The heat produced by the
Recorded Data: | Trial 1 | Trial 2 | Trial 3 | Trial 4 | Trial 5 | Mass of cashew (in grams) | 1.00 g (± 0.01 g) | 1.00 g (± 0.01 g) | 1.70 g (± 0.01 g) | 1.40 g (± 0.01 g) | 1.50 g (± 0.01 g) | Mass of remaining material (in grams) | 0.60 g (± 0.01 g) | 0.30 g (± 0.01 g) | 0.30 g (± 0.01 g) | 0.50 g (± 0.01 g) | 0.80 g (± 0.01 g) | Mass of cashew that burned (in grams) | 0.40 g (± 0.01 g) | 0.70 g (± 0.01 g) | 1.40 g (± 0.01 g) | 0.90 g (± 0.01 g) | 0.70 g (± 0.01 g) | Volume of liquid water (in mL) | 59 mL | 54 mL | 104 mL | 31 mL | 15 mL | Mass of liquid water (in grams) | 59 g | 54 g | 104 g | 31 g | 15 g |
Calculations:
The mass of a particular amount of a substance is equal to the product of the volume of that amount and the density of the substance.
Mass = Volume x Density
The density of water is 1.0 g/cm3, so it is assumed that the volume of water in mL will be equal to the mass of the water in g.
1 mL H2O = 1 g H2O
For example, in trial 1,
Volume of liquid water = 59 mL * Mass of liquid water = 59 g
Observations: 1. While the cashew was burning, the flame barely rose above the nut. 2. The cashew burned for a long duration of time (about 2 minutes). 3. The cashew was completely black (charred) and brittle after it was entirely burnt.
Processed Data: | Trial 1 | Trial 2 | Trial 3 | Trial 4 | Trial 5 | Heat produced by the burning cashew (in cal) | 4720 cal | 4320 cal | 8320 cal | 2480 cal | 1200 cal | Heat produced by 1 gram of cashew (in cal) | 11800 cal | 6171.43 cal | 5942.86 cal | 2755.56 cal | 1714.29 cal | Kilocalories of heat from 1 gram of cashew | 11.80 kcal | 6.17 kcal | 5.94 kcal | 2.76 kcal | 1.71 kcal |
Note: All decimal values are approximated to two decimal values.
Calculations:
The heat produced by the