Question: Why Heat Capacity Is Not A State Function?

Which quantities are state functions?

The thermodynamic state of a system refers to the temperature, pressure and quantity of substance present.

State functions only depend on these parameters and not on how they were reached.

Examples of state functions include density, internal energy, enthalpy, entropy..

What material has the highest specific heat capacity?

Liquid waterLiquid water has one of the highest specific heats among common substances, about 4182 J/(K kg) at 20 °C; but that of ice just below 0 °C is only 2093 J/(K kg).

Why is CP is greater than CV?

The heat capacity at constant pressure CP is greater than the heat capacity at constant volume CV , because when heat is added at constant pressure, the substance expands and work.

Why Heat is not a state function?

A state function is independent of pathways taken to get to a specific value, such as energy, temperature, enthalpy, and entropy. Enthalpy is the amount of heat released or absorbed at a constant pressure. Heat is not a state function because it is only to transfer energy in or out of a system; it depends on pathways.

What is not a state function in chemistry?

Heat is not a state function because it is not an intrinsic property of a system. Think about all the properties which are state functions – pressure, volume, internal energy, temperature, entropy etc. … Volume is the space occupied by the atoms/molecules. All these are very specific to that particular substance.

At what conditions heat can be a state function?

Hence, at constant volume and at constant pressure, heat change is a state function because it is equal to ΔU and ΔH respectively which are state functions.

Why temperature is a state function?

Temperature is a state function as it is one of the values used to define the state of an object. Furthermore, temperature is dependent on the final and initial values, not on the path taken to establish the values.

Is heat a state or path function?

Temperature is 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. If work isn’t a state function, then heat can’t be a state function either.

Is specific heat capacity a path function?

Any type of heat is a path function and extensive property because it depends on path followed by system like flow of heat is unidirectional in nature spontaneously as it flows from high temperatures to low temperatures.