Themodynamics

A well stoppered thermos flask contains some ice cubes. This is an example of

• Closed system

• Open system

• Isolated system

• Non thermodynamics system

For the reaction C(s) + O₂(g) → CO₂(g)

• △H >△U

• △H < △U

• △H = △U

• None of these

Density is a

• State function

• Path function

Mixture of oil and water is an example of ______system

• homogeneous

• heterogeneous

--------- is used to determine the calorific value of food.

• Coffee cup calorimeter

• Bomb calorimeter

For an adiabatic process

• q=0

• dT=0

• dP=0

• dV=0

Heat of combustion is always

• +ve

• -ve

• 0

Zeroth law of thermodynamics is:

• Kinetic energy of molecules of a gas is zero

• Ideal gas does not contain molecules

• If two systems are thermal equilibrium third one is also in equilibrium

• Absolute zero temperature cannot be obtained

Transfer of heat from low temperature to high temperature is

• None of these

• Possible by doing some external work

• Possible by keeping both the bodies in contact

• Impossible

An adiabatic process occurs at constant

• Temperature

• pressure

• heat

• none of these