First Law of Thermodynamics

A system's internal energy decreases by 100 kJ after performing 250 kJ of work. How much heat was transferred to or from the system?

• 150 kJ to the system

• 150 kJ from the system

• -350 kJ to the system

• 350 kJ from the system

Tags

NGSS.HS-PS3-1

NGSS.HS-PS3-4

In a closed system undergoing an adiabatic process, if the system does 150 kJ of work, how does this affect the internal energy of the system?

• Increases by 150 kJ

• Decreases by 150 kJ

• Remains unchanged

• Increases by 300 kJ

What is the capital of France?

• Paris

• London

• Berlin

• Madrid

40J of work is done by a gas when the system has an increase in internal energy of 125J. What energy is needed to do so?

• 165J

• 85J

• Can´t be possible

• 165Cal

Tags

NGSS.HS-PS3-1

Deduce how much heat transfer occurs from a system if its internal energy decreased by 350 J

while it was doing 50 J of work.

• 300 J

• -300 J

• 400J

• -400 J

Tags

NGSS.HS-PS3-1

NGSS.HS-PS3-4

During an isothermal expansion, a gas absorbs 200 kJ of heat. If the work done by the gas is 200 kJ, what is the change in internal energy of the gas?

• 0 kJ

• 200 kJ

• -200 kJ

• 400 kJ

Tags

NGSS.HS-PS3-2

NGSS.HS-PS3-4

A device that changes thermal energy into mechanical work.

• Heat Pumps

• Heat

• Heat Engines

• energy

The mathematical equation of the first law of thermodynamics is __________________.

• ΔU=W

• ΔU=Q

• ΔU=Q - W
  

The descriptive equation of the first law of thermodynamics is __________________.

A gas absorbs 500 J of heat and does 200 J of work. What is the change in internal energy of the gas?

• 300 J

• 700 J

• -300 J

• -700 J

Tags

NGSS.HS-PS3-1