Internal Energy, Heat and Work

What is internal energy?

• The total energy associated with atoms and molecules

• The bulk kinetic energy associated with the motion of the whole system

• The potential energy that exists between molecules

• The energy in transfer between a system and its surroundings

Tags

NGSS.HS-PS3-4

What does internal energy include?

• Potential energy between molecules

• Kinetic energy of random molecular motion

• Bulk kinetic energy of the whole system

• Both A and B

What is the relationship between energy and thermal energy?

• An increase in energy corresponds to an increase in thermal energy

• An increase in energy corresponds to a decrease in thermal energy

• There is no relationship between energy and thermal energy

• Thermal energy is always constant

Tags

NGSS.HS-PS3-4

What is bond energy?

• The part of internal energy associated with the random motion of molecules

• The potential energy that exists between molecules

• The energy in transfer between a system and its surroundings

• The bulk kinetic energy associated with the motion of the whole system

Tags

NGSS.HS-PS1-4

Is internal energy solely related to temperature?

• Yes, internal energy is directly proportional to temperature

• No, internal energy is not related to temperature

• Internal energy is only related to temperature in certain cases

• Internal energy is inversely proportional to temperature

Tags

NGSS.HS-PS1-5

Can a change in internal energy occur without a temperature variation?

• Yes, it is possible for a change in internal energy to occur without any temperature variation

• No, a change in internal energy always corresponds to a temperature variation

• Internal energy and temperature are always directly proportional

• Internal energy and temperature are always inversely proportional

What is the correct definition of heat?

• Energy in transfer between a system and its surroundings when they are at different temperatures

• The total energy associated with atoms and molecules

• The potential energy that exists between molecules

• The bulk kinetic energy associated with the motion of the whole system

Tags

NGSS.HS-PS3-4

What does heat transfer occur between?

• Two systems

• Two parts of a body or system that are at different temperatures

• Two systems and two parts of a body or system

• Heat transfer only occurs within a single system

Tags

NGSS.HS-PS3-4

What is an example of heat transfer?

• Heating a kettle of water to make tea

• Cooling drinks in the fridge

• The sun heating the earth

• All of the above

Tags

NGSS.HS-PS3-4