2nd Law of Thermodynamics

The second  law of thermodynamics states that entropy of a system  tends to ______________. 

• increase
• decrease
• stay constant
• fluctuate wildly

Tags

NGSS.HS-PS3-4

Entropy increases from solid, liquid to gas. Why?

• Molecular disorder increases
• Molecular randomness decreases
• Molecules are more energetic
• Molecules are more reactive

Tags

NGSS.MS-PS1-4

How many laws of thermodynamics are there?

• a lot
• 3
• 4
• 1

Many thermodynamic processes in nature occurs in one direction but not the opposite

• True

• False

• Maybe

• I do not know

Heat flow from a cool body to a hot body would not violate the 1st Law, energy would be still conserved

• True

• False

• Maybe

• Sometimes

Tags

NGSS.HS-PS3-4

During adiabatic, internally reversible process, what is true about the change in entropy?

• it is temperature dependent

• it is always greater than zero

• it is always zero

• it is always less than zero

What is the difference between adiabatic process and isentropic process?

• Adiabatic: heat transfer is not equal to zero

  Isentropic: heat transfer is zero

• Both: heat transfer = 0

  Isentropic : reversible

• Both: heat transfer is not equal to zero

  Isentropic: irreversible

• Adiabatic: heat transfer = 0

  Isentropic: heat transfer not equal to zero

Tags

NGSS.HS-PS3-4

For a heat engine operating between two temperatures (T2 > T1), what is the maximum efficiency attainable?

• 1 - (T1/T2)

• 1 - (T2/T1)

• T1 - T2

• 1 - (T12/T2)

Tags

NGSS.HS-PS3-3

NGSS.HS-PS3-4

What is the value of work done for a closed, reversible, isometric system?

• zero

• positive

• negative

• + / -

What is "Entropy"?

• The tendency of objects to warm up
• The tendency of energy to spread out
• The tendency of energy to make heat
• The tendency of objects to do work

Tags

NGSS.HS-PS3-4