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