Third Law of Thermodynamics

Which law of thermodynamics states that absolute zero cannot be reached?

• 1st
• 2nd
• 3rd
• Zeroth

It is possible to reach absolute zero

• true
• false

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

NGSS.MS-PS3-5

Entropy increases from solid, liquid to gas. Why?

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

How many laws of thermodynamics are there?

• a lot
• 3
• 4
• 1

What is absolute zero?

• 0 K
• 273 K
• 0^oC

 $\Delta G=\ .........+\ T\left(\frac{\partial\Delta G}{\partial T}\right)_P\ is\ GibbsHelmholtz\ equation.$  

•  $\Delta U$   

•  $\Delta S$  

•  $\Delta H$  

 $At\ the\ boiling\ point\ of\ a\ pure\ substace,\ \Delta S_{vap.}=100JK^{-1}mol^{-1}\ and\ \Delta H_{vap.}=60kJmol^{-1}.\ The\ boiling\ point\ will\ be:\$  

•  $500\ K$  

•  $600^{\degree}C$  

•  $166K$  

•  $600K$  

Heat supplied to a system at constant pressure to bring about a definite rise in temperature is

• $C_P$

• $C_V$

At temperatures close to absolute zero, which law is used to calculate heat capacity of the substance

• Debye-Huckel law

• Maxwell-Boltzman distribution law

• $Debye-T^{3\ }Law$

 $At\ \ temperatures\ close\ to\ absolute\ zero,\ C_P\approx C_V=$  

•  $aT^2$  

•  $aT^4$  

•  $aT^3$