Upgrade to remove ads
Heat and Heat Transfer Benchmark
Terms in this set (16)
When cooking, how would the specific heat capacity of a pot or pan affect the transfer of heat?
The higher the specific heat capacity of the substance/material you are cooking with, the more evenly and more efficiently it will cook food.
What is the relationship between temperature and the kinetic energy of molecules?
The higher the temperature, the higher the kinetic energy of the material
How do thermometers work?
When the thermometer is placed in a solution or substance, that solution/substance has a level of kinetic energy. The molecules in the substance affect the energy of the molecules in the glass of the thermometer, which in turn affects the motion of the molecules within the red alcohol filling it. Based on which way the transfer of energy happens the red alcohol will either begin to move faster and quicker (making it rise in the tube and giving you a reading of a higher temperature) or slower (making it shrink within the tube giving you a reading of a lower temperature).
What happens when heat is transferred from an outside environment to a liquid?
When heat is transferred from an outside environment to a liquid, the molecules within the liquid will begin to move faster and with more force. This will cause an increase in temperature of the liquid. If the heat is excessive, a phase change may occur. This would result in the liquid going to a gaseous state.
Explain what happened during our first experiment. This was the one where you created your own thermometers.
In our first experiment, we boiled water and then used a spirit glass to mark the boiling point on the tube. Then we put the spirit glass in an ice bath and marked the freezing point. We measured the distance and divided it into ten increments.
In the second part we added a large amount of salt to the water and boiled it and then froze it. We noticed that the temperature at which a phase changed occurred was significantly higher than the fresh water for boiling and significantly lower than the fresh water for freezing.
In what direction does heat flow?
Heat flows from areas of high concentration to areas of low concentration.
Why does ice melt in a drink?
Ice melts in a drink because the liquid in the glass is at a higher temperature than the ice itself. The flow of thermal energy goes from the liquid to the ice and then transfers to it, raising the temperature of the ice. This causes a phase change from the solid state to the liquid state.
What happens to the boiling point of water as you increase salt concentration?
As you increase the salt concentration of water, you increase the temperature at which that water will boil and experience a phase change. This is called "boiling point elevation"
What happens to the motion of molecules as heat and temperature increase? Describe their levels of energy and the force with which they hit each other.
As heat increases, temperature, level of energy, and the molecules velocity also increases.
What is heat?
Heat is the amount of kinetic energy located in the molecules of the substance.
What happens to the freezing point of water as you increase salt concentration?
When you increase the salt concentration of water, you lower the temperature at which the water will freeze and experience a phase change. This is called "freezing point depression"
What happens to the liquid in a spirit glass when you heat it? Why does this occur?
When you heat up a spirit glass, you increase the kinetic energy of the molecules. This increase in the amount of kinetic energy causes the molecules of the alcohol within the tube to hit each other with a greater force. This increase in force with which they hit each other causes the liquid to begin to rise up the tube.
What is specific heat capacity?
The amount of thermal energy needed to raise 1 gram of the substance one degree Celsius
What happens to the liquid in a spirit glass when you place it in extremely cold water? Why does this occur?
When you place a spirit glass in cold water, the thermal energy within the alcohol in the tube transfers its thermal energy outward to the surrounding environment. This causes the molecules in the glass tube velocity slow down. We perceive this as a shrinking of the liquid within the spirit glass.
When water boils, what happens to the kinetic energy of the molecules? What happens to the bonds between the molecules? What happens to the state or phase of the water?
When water boils, the kinetic energy of the molecules increases. This increase causes the water to go through a phase change from liquid to gas. In order for a phase change to occur, the bonds between the molecules must be broken.
What is the Law of Conservation of Energy?
Energy can not be created nor destroyed. It simply changes form.
THIS SET IS OFTEN IN FOLDERS WITH...
Level C unit 12 - sentences
5-2 Study Guide
Vocabulary Workshop Level C Unit 14
OTHER SETS BY THIS CREATOR
Religion Ch. 18-19 Test
Science Final Exam Vocabulary
Tuesdays with Morrie Test (8-11 Tuesdays)
Spanish chapter 5b vocabulario
OTHER QUIZLET SETS
BIO 103 CH. 11, 12, 13, & 16
English Exam 3
Anatomy Lab 15