Lab6 latent heat Essay

2. a) Liquid nitrogen boiling at -196°C is a physical property because it describes the boiling point of a substance, which is also when it changes state. A change of state, from a liquid to a gas, is a physical property because there is no new substance being created.

2. Did the temperature of the water rise or fall when the NH4NO3 was added. Explain this in terms of heat transfer.

always give out or take in energy most of the time this is heat energy

2. Calculate the average rate of water loss per day for each of the treatments(Humidity, Light, Fan,

Heat: The amount of energy associated with the movement of atoms and molecules in matter.

6. Restate your predictions that were correct and give the data from your experiment that supports them. Restate your predictions

The control experiment for this investigation will be the experimental setup of 5 trials using 5oC as the temperature. All the steps in the method will be followed.

605). Energy cannot be created or destroyed; it only changes form. There are several sources of heat. These sources are chemical, mechanical, electrical, and nuclear.

The steam enters the heat exchanger as 50% quality steam and exits as water condensate at 85°C. Calculate the mass of steam required to heat 150 kg of cider. (For the cider, assume the Cp=3.651 kJ/kg°C, and latent heat=280.18 kJ/kg.)

A. Water boils at 100°C at sea level. If the water in this experiment did not boil at 100°C, what

In this experiment, we investigate the change in temperature caused by adding a chemical substance into the water and dissolving it. The results recorded in the table below show that our hypothesis is correct.

change are, heat needs to change from a flowing fluid to kinetic energy in transit and

I started this experiment with five Ziploc bags labeled with the date and time of the experiment. (07/20/2017, 07:19AM). I soaked five piece of paper towel in a cup of water. I squeezed them, put them into the Ziploc bags, and placed them separately on a dark and warm basement closet with the temperature approximately 70 degrees.

We will be using 6 different fuels to heat up 100ml of water, and find out the changes of the temperature. We will measure the temperatures of the water before and after the experiment. We will burn heat the water for exactly 2 minutes, and check the changes in temperature. The change in temperature will allow us to work out the energy given off the fuel by using this formula:

An increase in internal energy is required to convert a solid to a liquid,. Conversely, a reduction in internal energy can cause liquids to freeze or solidify. When heat is added to a solid or a liquid, the temperature of the sample does not necessarily rise. During a phase change, heat is added to the sample without an increase in temperature. Heat absorbed or released as the result of a phase change is called latent heat. There is no temperature change during a phase change, thus there is no change in the kinetic energy of the particles in the material. Latent heat is an intensive