Vocabulary
A device that is able to continuously convert thermal energy to mechanical energy
What is a heat engine?
List the three types of heat transfer
What are conduction, convection, and radiation?
Specific heat is the amount of energy needed to raise 1 kg of water by this temperature
What is 10C?
At what temperature, in Celsius, does water boil?
How much heat is needed to melt a 50 kg block of ice?
What is 16,500,000 J?
Amount of thermal energy needed to change 1 kg of a substance from a liquid to a gaseous state
What is Heat of Vaporization?
Type of heat transfer that requires direct contact
What is conduction?
Compared to most materials, water has a (higher or lower) specific heat
What is higher?
The temperature at which a solid becomes a liquid is called
What is melting point?
How much heat is needed to vaporize 20 mL of water?
What is 52,000,000 J?
Amount of thermal energy needed to change 1 kg of a substance from a solid to liquid state
What is heat of fusion?
Type of heat transfer as in sunlight and microwaves
What is radiation?
When you stir a pot of boiling water with a wooden spoon, you do not feel much of a temperature change in the spoon. This is because the wooden spoon has a (high or low) specific heat.
What is high?
As liquids become gases, their particles begin to spread out, thus dispersing their energy. The measurement of this dispersal is called
What is entropy?
Calculate the specific heat capacity of a piece of wood if 1500.0 g of the wood absorbs 68,000 J of heat, and its temperature changes from 30°C to 60°C.
What is. 1.5 J/g0C?
States that whenever there is an opportunity for energy dispersal, energy spreads out
First law of thermodynamics
On a thermal energy graph, what part of the fitted line represents a phase change?
What is a plateau?
The (greater or lower) the specific heat of an object, the more that material conducts heat.
What is lower?
When going from a solid to a liquid, you use the heat of ____ to determine the total amount of heat absorbed.
What is fusion?
A 5.0 kg ice block at 1 °C is heated until it completely melts and then is additionally heated to 30°C. How much total thermal energy was absorbed? Assume the specific heat of water is 4,184.
States that the change in thermal energy (∆U) of an object is equal to the heat (Q) that is added to the object minus the work (W) done by
the object
What is Second Law of Thermodynamics?
When increasing thermal energy, at what point(s) is there not an increase in temperature?
What are phase changes?
A 10 g piece of iron absorbs 1,000 J of heat, causing its temperature to rise from 250C to 700C. This would consider iron's specific heat to be (high or low)
What is low?
A 100 mL pot of water completely boils. During which phase, liquid or gaseous, does the water have higher thermal energy?
What is gaseous?
20 kg of water is heated from 50°C to 110°C when it completely vaporizes. How much heat was absorbed? Assume the specific heat of water is 4,184.
What is 49,020,800 J?