Table of Contents
What is the meaning of state the function?
A state function is a property whose value does not depend on the path taken to reach that specific value. In contrast, functions that depend on the path from two values are call path functions. Both path and state functions are often encountered in thermodynamics.
Which one is a state function?
A state function is simply one that depends only on the start and endpoint, and not the path. Example; internal energy (U), enthalpy (H), entropy (S) etc.
Is mass a state function?
Mass measures the quantity of matter regardless of both its location in the universe and the gravitational force applied to it and thus it is a state function.
Is work a state function?
Heat and work are not state functions. Work can’t be a state function because it is proportional to the distance an object is moved, which depends on the path used to go from the initial to the final state. Thermodynamic properties that are not state functions are often described by lowercase letters (q and w).
Why entropy is state function?
A state function specifies a system’s equilibrium state, as well as the kind of system. . Entropy is a state function since it depends not only on the start and end states, but also on the entropy change between two states, which is integrating tiny entropy change along a reversible route.
What is state function Class 12?
(ii) State functions: A state function is a property of the system whose value depends on only upon the state of the system and is independent of the path or manner by which the state is reached. For example, pressure, volume, temperature, internal energy (E), enthalpy (H), entropy (S) etc. are state functions.
Is WA a state function?
i)Q is heat of the system while w is the work done on or done by the system. Q and W both depend on the path so neither of them is a state function. Here U is internal energy of the system which is a state function.
Is work is a state function?
Are moles state function?
The ideal gas law, for example, is an equation of state. The same can be said for the volume, pressure, and the number of moles of gas in the sample. These quantities are all state functions.
Is Q state function?
q isn’t a state function because it isn’t solely dependent on the initial and final states; the value of q depends on the pathway taken to reach the final q.
What are not state functions?
Heat and work are not state functions. Work can’t be a state function because it is proportional to the distance an object is moved, which depends on the path used to go from the initial to the final state. If work isn’t a state function, then heat can’t be a state function either.
Which is the correct definition of a state function?
In the thermodynamics of equilibrium, a state function, function of state, or point function is a function defined for a system relating several state variables or state quantities that depends only on the current equilibrium thermodynamic state of the system (e.g. gas, liquid, solid, crystal, or emulsion ), not the path which
How are state and path functions used in chemistry?
Both path and state functions are often encountered in thermodynamics. Whenever compounds or chemical reactions are discussed, one of the first things mentioned is the state of the specific molecule or compound. “State” refers to temperature, pressure, and the amount and type of substance present.
When is a state function not a path function?
As stated before, a state function is a property whose value does not depend on the path taken to reach that specific function or value. In essence, if something is not a path function, it is probably a state function. To better understand state functions, first define path functions and then compare path and state functions.
Are there any functions that only the state can perform?
From what MacIver says the conclusion may be drawn that there are certain functions which only the state can perform; others, which it is wholly incapable of performing and those which it can with advantage perform and for which it is well adapted.