Chemical thermodynamics

A system which exchanges both matter and energy is called --- system

Tags

NGSS.HS-LS2-3

Temperature is ----- property

• Intensive property

• Extensive property

Tags

NGSS.HS-PS3-4

In an isothermal process

• Delta U=0

• Q=0

• T=0

• none of these

Mathematical equation of first law of thermodynamics is

Here U means delta U

• U=q+W

• q=U+W

• W=U+q

• None of these

Enthalpy H =

• U-PV

• U+PV

• PV

• PV-U

Tags

NGSS.HS-PS3-1

Delta S >0 then reaction

• Non spontaneous

• Spontaneous

• At equilibrium

• None of these

Which of the following is true for a closed system?

• mass entering = mass leaving

• mass does not enter or leave the system

• mass entering can be more or less than the mass leaving

• none of the mentioned

Tags

NGSS.HS-PS1-7

Thermodynamics is not concerned about

• Energy changes involved in a chemical reaction.

• The extent to which a chemical reaction proceeds

• The rate at which a reaction proceeds.

• The feasibility of a chemical reaction.

Tags

NGSS.HS-PS3-4

NGSS.HS-PS1-4

Which of the following statements is correct?

• The presence of reacting species in a covered beaker is an example of open system.

• There is an exchange of energy as well as matter between the system and the surroundings in a closed system.

• The presence of reactants in a closed vessel made up of copper is an example of a closed system.

• The presence of reactants in a thermos flask or any other closed insulated vessel is an example of a closed system.

The state of a gas can be described by quoting the relationship between

• pressure, volume, temperature

• temperature, amount, pressure

• amount, volume, temperature

• pressure, volume, temperature, amount