Macromolecules Lab Report Essay
ENERGY RESERVES OF MACROMOLECULES
SUMMARY
This experiment was conducted in order to show the energy received from the food that humans eat on a daily basis. The energy that is required by the human body to perform chemical reactions is obtained from the chemical bonds that formed between the atoms in the molecules. To calculate the amount energy, types of food products were burned underneath a test-tube filled with water. The temperature rise gave an estimate of the energy released per gram.
HYPOTHESIS
If the weight of the food product is lighter then the temperature rise is greater and the energy content of the food product is higher.
VARIABLES
Independent Variable: Heat energy released by the food product.
Dependent Variable: Temperature rise of the water.
Controlled Variable: Amount of water.
RESULTS
After measuring the temperature rise, the energy released per gram was calculated. The calculations are shown in the table below.
Table.1 Energy resealed per gram (J) of food for different trials of various …show more content…
It can only be transferred from one location to another i.e. food product to water. Food products have heat energy in the form of a calorie. A calorie is an amount of energy or heat which is required to increase the temperature of 1g of water by 1ºC. To determine the energy content of the food, it was burned to capture the heat released that increased the temperature of 20g of water. This theory is supported by the results above. Heat energy was transferred from the burning cracker/sugar cube because the stored chemical energy was converted due to combustion. This allowed to easily measure the heat flow. A similar method is used by the human body when an individual consumes a food product. The energy is released from a food product due to their nutritional content which includes carbohydrates, proteins, fats and
SUMMARY
This experiment was conducted in order to show the energy received from the food that humans eat on a daily basis. The energy that is required by the human body to perform chemical reactions is obtained from the chemical bonds that formed between the atoms in the molecules. To calculate the amount energy, types of food products were burned underneath a test-tube filled with water. The temperature rise gave an estimate of the energy released per gram.
HYPOTHESIS
If the weight of the food product is lighter then the temperature rise is greater and the energy content of the food product is higher.
VARIABLES
Independent Variable: Heat energy released by the food product.
Dependent Variable: Temperature rise of the water.
Controlled Variable: Amount of water.
RESULTS
After measuring the temperature rise, the energy released per gram was calculated. The calculations are shown in the table below.
Table.1 Energy resealed per gram (J) of food for different trials of various …show more content…
It can only be transferred from one location to another i.e. food product to water. Food products have heat energy in the form of a calorie. A calorie is an amount of energy or heat which is required to increase the temperature of 1g of water by 1ºC. To determine the energy content of the food, it was burned to capture the heat released that increased the temperature of 20g of water. This theory is supported by the results above. Heat energy was transferred from the burning cracker/sugar cube because the stored chemical energy was converted due to combustion. This allowed to easily measure the heat flow. A similar method is used by the human body when an individual consumes a food product. The energy is released from a food product due to their nutritional content which includes carbohydrates, proteins, fats and