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WorksheetsME 43 QUIZ 2
Total questions: 25
Worksheet time: 40mins
Do molecules generally move faster at 45 C or 106 C?
45 C because molecules have more energy than in 106C
106 C because molecules have more energy than in 45C
106 C because molecules have less energy than in 45C
45C because molecules have less energy than in 106 C
When you place the metal in boiling water, heat flows from the _________ to the _______.
metal to the boiling water
bottom of the metal to the top half of the metal
bottom of the water to the top of the water
boiling water to the metal
Specific Heat is..
the temperature initial minus temperature final
the amount of heat/energy required to raise 1 gram of a substance by 1°C (or K) aka "C"
the temperature final minus temperature initial
the item in a system with given weight in grams
YOU HAVE TIME!
How much energy is needed to raise the temperature of a 20.0g piece of copper from 15.0 degrees Celsius to 25.0 degrees Celsius? (The specific heat of copper is 0.385 J/g C)
20 X (25-15) =70 J
20 X .385 X (25-15)= 77 J
20 X .385 X (15-25)= 62 J
20 X .385 X (15-0)= 77 J
The 1st law of Thermodynamics
Energy can not be created or destroyed. It just changes forms.
Energy can only be created by the sun
Some energy is lost to the environment.
2nd law of thermodynamics
Every time energy changes form, some of it is lost to the environment
Energy can't be created or destroyed
All energy generates heat
Specific Heat
the amount of energy it takes to raise one gram of a substance by one degree Celsius
The internal energy of an object
The measure of the kinetic energy of an object's molecules
Conductor
A material that thermal energy travels through easily
A material that energy does NOT transfer through easily
Energy that travels in the form of electromagnetic waves
Insulator
A material the energy does NOT transfer through easily
A material that thermal energy travels through easily
The measure of the kinetic energy of an object’s molecules
Conduction
The transfer of thermal energy through solids
The transfer of thermal energy through liquids and gases
The transfer of thermal energy as electromagnetic waves
Convection
The transfer of thermal energy through liquids and gases
The transfer of thermal energy through solids
The transfer of thermal energy as electromagnetic waves
Radiation
The transfer of thermal energy as electromagnetic waves
The transfer of thermal energy through solids
The transfer of thermal energy through liquids and gases
Specific Heat
The amount of thermal energy it takes to raise one gram of a substance by one degree Celsius.
An object’s internal energy
The measure of the kinetic energy of an object’s molecules
Fahrenheit scale
The temperature scale that is used only in America and 2 countries in the Caribbean.
The temperature scale that has water freeze at zero degrees and boil at 100 degrees
The temperature scale that has water freeze at 273 K and boil at 373 K.
Celsius Scale
water freezes at 0 degrees and boils at 100 degrees
water boils at 212 degrees and freezes at 32 degrees
Water boils at 273 degrees and boils at 373 degrees
Geothermal uses _______ to heat and cool a home
The internal energy of the earth
natural gas
Solar energy
