Thermodynamics

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-PS1-4

NGSS.HS-PS3-4

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

Which of the following variables controls the physical properties of a perfect gas

• pressure

• temperature

• volume

• all of the above

Intensive property of a system is one whose value

• depends on the mass of the system, like volume

• does not depend on the mass of the system, like temperature, pressure, etc.

• is not dependent on the path followed but on the state

• is dependent on the path followed and not on the state

Work done in a free expansion process is

• + ve

• -ve

• zero

• maximum

An isolated system is one in which

• mass does not cross boundaries of the system, though energy may do so

• neither mass nor energy crosses the boundaries of the system

• both energy and mass cross the boundaries of the system

• mass crosses the boundary but not the energy

In a free expansion process

• (a) work done is zero

• (b) heat transfer is zero

• (c) both (a) and (b) above

• (d) work done is zero but heat increases

First law of thermodynamics furnishes the relationship between

• heat and work

• heat, work and properties of the system

• heat and internal energy.

• various properties of the system