Phys 1415 Chapter 6
the lowest possible temperature is
-273 degrees celsius
Which of these is the smallest?
1 Fahrenheit degree
A volume of helium gas has a temperature of 0 degrees Celsius. The same gas twice as hot has a temperature of
273 degrees Celcius
Room temperature on the kelvin scale is about
300 K
Increasing the temperature of 50 grams of water by 1 degree Celsius requires
50 calories
The motion of particles that contribute 2 thermal energy are
All of the above (-vibrational -rotational -translational)
On which temperature scale is 212 degrees the boiling point of water?
Fahrenheit
Which law of thermodynamics is a restatement of the conservation of energy as it applies to thermal systems?
First law
Which will stay cooler for a longer time in a picnic cooler on a hot summer day?
Jello
Whether one object is warmer than another object has most to do with molecular
Kinetic energy
Heat is simply another word for
None of the above
Which law of thermodynamics addresses the direction of heat flow?
Second law
The fact that a thermometer "takes its own temperature" illustrates
Thermal equilibrium
When you place a sealed can of air on a hot stove, air in the can undergoes an increase in
all of the above (-temperature -pressure -thermal energy)
Thermal energy is measured in
any or all of the above for special cases (-calories -joules -Calories)
The final temperature of 1 liter of 40 degree Celsius water poured into 1 liter of 20 degree Celsius water is
at or about 30 degrees Celsius
A pre-electronic thermostat employs a coiled
bimetallic strip
Heat energy is measured in units of
both joules and calories
The rise in ocean levels is due to
both of these (-melting ice on land that flows into the ocean -warmer water)
The temperature of melting ice is
both of these (32°F and 0°C)
If water at 0 degrees Celsius slightly increases in temperature, the water
contracts
When work is done by a system and heat is subtracted, the temperature of the system
decreases
When the temperature of a fixed volume of air initially at 0 degrees Celcius is lowered by 1 degree, its pressure
decreases by 1/273
If water at 4 degrees Celsius slightly decreases in temperature, the water
expands
When most substances are heated, molecules inside move faster and occupy more space, resulting in thermal
expansion
The operation of a bimetallic strip relies on differences in
expansions of metals
When you touch a hot penny in the sunlight with your finger, energy flows
from the penny to your finger
If the same quantity of heat is added to both a 1-liter and a 2-liter container of water, the temperature change in the 1-liter container will be
greater
More disorder means
greater entropy
Which contracts more when the temperature is decreased? Equal volumes of
helium
The direction of natural process is from states of
higher order to lower order
Heat is thermal energy that flows from
hot to cold
When you rapidly stir raw eggs with an eggbeater, the temperature of the eggs
increases
Because a refrigerator operates with some kind of motor, leaving the refrigerator door open for hours in a closed room
increases room temperature
As your room gets messier day by day, entropy is
increasing
Which of the following normally warms up faster when heat is applied?
iron
Ice has a lower density than water because ice
is composed of open-structured crystals
When an iron ring is heated, the hole becomes
larger
Microscopic slush in water tends to make the water
less dense
Hot sand cools off faster at night than plants and vegetation. This indicates that the specific heat capacity of sand is
less than for plants
Compared to a giant iceberg, a hot cup of coffee has
less thermal energy at a higher temperature
If the specific heat capacity of water were lower, ponds in the cold winter would be
more likely to freeze
At absolute zero, a substance has
no more energy to give up
Water at 4 degrees Celsius will contract when it is slightly
none of the above
Thermal energy will flow in a direction from cold to hot
only with external effort
San Franscisco has milder winters than Washington D.C. due to water's high
specific heat capacity
When ice floats in water, a small part of it extends above the surface. Interestingly, the volume of ice that extends above the surface is equal to the volume of the
vast number of open spaces in the hexagonal ice crystals
During a very cold winter, water pipes sometimes burst because
water expands when freezing
After an apple pie is taken from an oven, the pie filling is hotter than the crust due to
water in the filling that better retains thermal energy
When a metal ring with a gap in the shape of the letter C is heated, the gap becomes
wider