Topic 5 from Quiziz
Which of the following electromagnetic waves is given off as heat?
infrared rays
How many joules are required to boil 75 grams of water?
169500J
The temperature of a 6.0 g sample of glass changed from 20.0°C to 45.0°C when it absorbed 550 J of heat. What is the specific heat of this glass?
3.7 J/g °C
How many Joules of energy are required to make 100 grams of ice at 0 οC completely melt?
33,400 J
How much energy is needed to raise the temperature of 5.0 grams of lead from 25°C to 35°C?
6.45 J
What is temperature?
A measure of the average kinetic energy of particles
Why does water NOT change temperature during boiling?
Because all of the energy is used to break the bonds that are found in the molecule
Which is more dense?
Cold Liquid
What type of heat transfer takes place in solids?
Conduction
What type of heat transfer takes place in liquids and gasses?
Convection
Which of the following is the transfer of energy as heat by the movement of a liquid or gas.
Convection
If the wavelength of an electromagnetic wave is longer, what is true about the energy?
Energy is lower.
___________ is measured by the unit Joules.
Heat Energy
Heat transfer always goes from ___________________
Hot to Cold
Object A has a specific heat of 4.45 J/g⁰C and object B has a specific heat of 1.82 J/g⁰C. Which object will heat up faster?
Object B, it has a lower specific heat
Which example below is an example of radiation?
The Sun heating the Earth
What causes the circulation of air in the atmosphere?
The ground is heated by the sun and then heats the air, causing the air to rise.
On a hot summer day, a student jumps in a pool to freshen up. Which of the following is the best explanation of why the student felt much better as soon as he jumped in the water?
The heat of the student is transferred to the pool making the water of the pool warmer
Which example below is an example of conduction?
Touching hot sand with your feet
Radiation is heat transfer by ____________
Waves
Warm air is __________ dense than cold air and rises creating convection currents.
less
How are solids different from liquids?
particles in solids are vibrating in place.
What best describes the motion of atoms in a solid?
vibrating slowly in place
Heat energy moves from __________ things to _________ things.
warm / cold
Which substance would take a long time to cool off?
water
The distance between one point of a wave to the same point on the next wave.
wavelength
How much heat is required to warm 275 g of water from 76C to 87C?
12644J
Which example below is an example of convection?
The attic is warmer than the basement
Conduction is heat transfer by __________________
Touch
Which process takes the longest to occur?
boiling
When warm air rises and the cool air sinks, it is ____________
convection
A wave with a large wavelength will have a ______ frequency and _____ energy
low, low
How do you calculate the amount of heat?
multiply mass times temperature change times specific heat
During a phase change, the temperature
stays the same
What can be determined by measuring the speed of molecules?
temperature