physics research paper
RESEARCH PAPER IN PHYSICS
By: Sharmaine Joyce T. Sebastian
B.S PT 2A2-1
College of Physical Therapy
Sebastian, Sharmaine Joyce T.
December 2, 2013
1. Why an ice cube at 0°C is more effective in cooling soft drink than the same mass of water at 0 °C? Enthalpy of fusion is the change in enthalpy resulting from heating a given quantity of a substance to change its state from a solid to a liquid. The temperature at which this occurs is the melting point would probably be a great explanation on why ice cube in 0 degree centigrade is more effective in cooling a soft drink than the same mass of water with a same temperature. The liquid phase has a higher internal energy than the solid phase. This means energy must be supplied to a solid in order to melt it and energy is released from a liquid when it freezes, because the molecules in the liquid experience weaker intermolecular forces and so have a higher potential energy (a kind of bond-dissociation energy for intermolecular forces). When liquid water is cooled, its temperature falls steadily until it drops just below the freezing point at 0 °C. The temperature then remains constant at the freezing point while the water crystallizes. Once the water is completely frozen, its temperature continues to fall. The solid substance (ice) acquires more fixed particles than the water; the ice will need a large amount of heat to change its phase or to liquid than the water. So the ice can truly support the soft drink to cool.
2. Why do some cooks put long aluminum nails through potatoes to be baked? I like the taste of potatoes better when they are baked in the oven, as opposed to the microwave; however, it takes ever so much more time to do it this way. If you are in a time-crunch, and want to hasten baking time, then place a well-scrubbed nail into the middle of each potato before you put them into the oven. This method hastens the cooking time tremendously. Some say
By: Sharmaine Joyce T. Sebastian
B.S PT 2A2-1
College of Physical Therapy
Sebastian, Sharmaine Joyce T.
December 2, 2013
1. Why an ice cube at 0°C is more effective in cooling soft drink than the same mass of water at 0 °C? Enthalpy of fusion is the change in enthalpy resulting from heating a given quantity of a substance to change its state from a solid to a liquid. The temperature at which this occurs is the melting point would probably be a great explanation on why ice cube in 0 degree centigrade is more effective in cooling a soft drink than the same mass of water with a same temperature. The liquid phase has a higher internal energy than the solid phase. This means energy must be supplied to a solid in order to melt it and energy is released from a liquid when it freezes, because the molecules in the liquid experience weaker intermolecular forces and so have a higher potential energy (a kind of bond-dissociation energy for intermolecular forces). When liquid water is cooled, its temperature falls steadily until it drops just below the freezing point at 0 °C. The temperature then remains constant at the freezing point while the water crystallizes. Once the water is completely frozen, its temperature continues to fall. The solid substance (ice) acquires more fixed particles than the water; the ice will need a large amount of heat to change its phase or to liquid than the water. So the ice can truly support the soft drink to cool.
2. Why do some cooks put long aluminum nails through potatoes to be baked? I like the taste of potatoes better when they are baked in the oven, as opposed to the microwave; however, it takes ever so much more time to do it this way. If you are in a time-crunch, and want to hasten baking time, then place a well-scrubbed nail into the middle of each potato before you put them into the oven. This method hastens the cooking time tremendously. Some say