HW 5
The lowest temperature possible in nature is
-273 degrees C.
The freezing point of water in the Celcius scale is
0 degrees C.
The specific heat capacity is the heat required to raise ____ of a substance by ____.
1 gram, 1 degree C
How much heat energy is required to heat 500g of water from 10 degrees C to 84 degrees C? The specific heat of water is 4.18 J/(g*C) Round your answer to 1 decimal place.
154660
The lowest temperature ever recorded in the United States is -78 degrees F. What is this temperature in kelvins? Round your answer to 1 decimal place
212.0
A friend from Europe is visiting you and sees the weather forecast on TV. The forecast is for a high temperature of 81 degrees Fahrenheit, and your friend asks you what this temperature is in Celcius. What do you tell her? Round your answer to 1 decimal place.
27.2
The freezing point of water in the Kelvin scale is
273 K.
Entropy is closely related to the
2nd law of thermodynamics.
Room temperature on the Kelvin scale is about
300 K.
The highest temperature ever recorded in the United States is 133 degrees F. What is this temperature in kelvins? Round your answer to 1 decimal place.
329.3
In your house, most heat is lost through the process of
Conduction
_______ is heat transferred through the motion of mass of a substance.
Convection
A temperature difference of 10 degrees Celsius is also equal to a temperature difference of 10 on the
Kelvin scale.
True or False: Heat is a form of energy.
True
The fact that desert sand is very hot in the day and very cold at night is evidence that sand has
a low specific heat.
A good heat conductor is
a poor insulator.
Substances absorb heat energy by the process of
conduction, convection, radiation
The first law of thermodynamics is a restatement of the
conservation of energy
Aluminum has a specific heat capacity more than twice that of copper. Place equal masses of aluminum and copper wire in a flame and the one to undergo the fastest increase in temperature will be
copper
True or False: Temperature is a form of energy.
false
As a system becomes more disordered, entropy
increases
Your feet feel warmer on a rug than on a tile floor because a rug
is a better insulator than tile.
Energy transfer by convection is primarily restricted to
liquids and gases.
A substance that heats up relatively quickly has a
low specific heat capacity.
Systems that are left alone, tend to move toward a state of
more entropy
The molecules in an object with a higher temperature
move faster.
The earth receives about 1.7 x 10^17 J of energy from the sun each second through a process called
radiation.
True or False: Thermometers are usually based on the idea of thermal expansion.
true
