First law of thermodynamics

When applying the first law of thermodynamics to a system, when is heat a positive quantity?

• when the system does work
• when the system has work done on it
• when the system absorbs heat
• when the system loses heat
• when no work is done either on the system or by the system

Tags

NGSS.HS-PS3-4

The product of the pressure and volume of a system  has the same SI units as which one of the following choices?

• force
• work
• acceleration
• momentum
• impulse

What does R stand for

• Ideal gas constant

• Real gas constant

• Temperature constant

• Ideal gas law

Particles (molecules) in a ______________________ have less energy than the other states of matter.

• gas

• solid

• liquid

What is internal energy?

• The amount of heat an object contains.
• The sum of the kinetic and potential energy of the particles of a substance.
• Something we can measure easily.
• Something that does not exist.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Which state of H₂O  has the greatest entropy?

• Ice
• Water
• Vapor

Tags

NGSS.MS-PS1-4

The amount of thermal energy required to raise the temperature of one (1) kilogram of a substance by 1^o C is known as:

• Specific heat
• Heat of fusion
• Heat of vaporization
• Melting point

Tags

NGSS.MS-PS1-4

Which of the following is not the equation for adiabatic process

• 
  

  $TV^{\gamma-1}\ =\ C$
  

• $PV^{\gamma\ }$ = Constant

• PV = Constant

• $P^{1-\gamma}T^{\gamma}=\ C.$ = constant.

Which of the following is a thermodynamic potential.

• Pressure

• Volume

• Temperature

• Enthalpy

In an isothermal process

• du = -dv

• dQ = du

• dQ = Cp dT + Pdv

• dQ = dw