firecool said:
at 3:30 he introduces heat content to show why it can't be a state variable. he says that if q=2 is added to the cycle everytime you go around the cycle the heat content would be incremented by 2. but as heat=work shouldn't that extra 2 be lost as work and at point 1 you always have hc=5? watch the video to make sense of my question.. :)
Heat content, also known as enthalpy, is a thermodynamic property that represents the amount of energy in a system that is available for mechanical work. It is a state function because it depends only on the current state of the system, not on the path taken to reach that state.
Heat content is the total amount of energy in a system, while heat is the transfer of energy from one system to another. Heat content is a property of the system, while heat is a process.
Heat content is important in thermodynamics because it helps us understand how energy is exchanged between systems and how it affects the overall state of a system. It allows us to make predictions about how a system will behave under different conditions and how to optimize processes for maximum efficiency.
No, heat content cannot be measured directly. It is a thermodynamic property and can only be calculated by combining other measurable properties such as temperature, pressure, and volume.
The heat content of a system can change during a chemical reaction due to the absorption or release of heat. If a reaction releases heat, the heat content of the system decreases, while if it absorbs heat, the heat content increases. This change in heat content can be calculated using the enthalpy of reaction.