Best example of an isolated system in chemistry apex

Answer;

Universe is a best example of isolated system.

-Also a perfectly isolated vacuum flask containing a hot or cold liquid is an example of an isolated system,

Explanation;

An isolated system is a thermodynamic system that cannot exchange either energy or matter outside the boundaries of the system. An isolated system differs from a closed system by the transfer of energy.

A system is isolated when there is no energy exchange with the surroundings. For example the contents of a vacuum flask are isolated. Because the hot or cold liquid in a flask is being closed off from its surrounding by the thermo bottle and there is no exchange in neither energy nor matter, the system is isolated.

the ideal gas law equation is as follows

pv = nrt

where p - pressure

v - volume

n - number of moles

r - universal gas constant

t - temperature

so if the pressure, volume and temperature are already known

we are left with n and r

since r is the universal gas constant that has a known fixed value then r too is known

so we are left with 'n'

once we know temperature volume and pressure

we can find the number of moles of gas present using the ideal gas law equation

this is not my own answer, this is an answer for the same question by the user blahblahmali. i do not claim ownership of this account.

while cooking a piece of 1/2 pound beef steak, a cast iron pan (2.4kg in weight) was heated 260 celsius.