Mixture of oil and water is an example of ______system

Isolated system can exchange------- with its surroundings.

------ is an extensive property.

For an adiabatic process

For an isothermal process----

Work and heat are ------function.

 $\Delta$  U is -ve when

If heat flows into the system from the surrounding, heat is taken as ------

If work is done by the system, the energy of the system decreases, work is taken as--------

In an exothermic reaction,heat is evolved by the system to the surroundings.

The enthalpy of formation of O₂ in the standard state is ------

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

C (diamond) ------------> C ( graphite),

Heat of combustion is always