Below is a text over which I have my questions which I have written below this text:
“Chemical energy stored by molecules can be released as heat during chemical reactions when a fuel like methane, cooking gas or coal burns in air. The chemical energy may also be used to do mechanical work when a fuel burns in an engine or to provide electrical energy through a galvanic cell like dry cell.
Chemical energy stored by molecules can be released as heat during chemical reactions when a fuel like methane, cooking gas or coal burns in air.
Thus, various forms of energy are interrelated and under certain conditions, these may be transformed from one form into another.
The chemical energy may also be used to do mechanical work when a fuel burns in an engine or to provide electrical energy through a galvanic cell like dry cell.
The study of these energy transformations forms the subject matter of thermodynamics. The laws of thermodynamics deal with energy changes of macroscopic systems involving a large number of molecules rather than microscopic systems containing a few molecules. Thermodynamics is not concerned about how and at what rate these energy transformations are carried out, but is based on initial and final states of a system undergoing the change. Laws of thermodynamics apply only when a system is in equilibrium or moves from one equilibrium state to another equilibrium state. Macroscopic properties like pressure and temperature do not change with time for a system in equilibrium state.”
Thus, various forms of energy are interrelated and under certain conditions, these may be transformed from one form into another.
The study of these energy transformations forms the subject matter of thermodynamics. The laws of thermodynamics deal with energy changes of macroscopic systems involving a large number of molecules rather than microscopic systems containing a few molecules. Thermodynamics is not concerned about how and at what rate these energy transformations are carried out, but is based on initial and final states of a system undergoing the change. Laws of thermodynamics apply only when a system is in equilibrium or moves from one equilibrium state to another equilibrium state. Macroscopic properties like pressure and temperature do not change with time for a system in equilibrium state.
- What is chemical energy ? 1st paragraph
What I read online: In conclusion to all :
Chemical energy is energy stored in the bonds of chemical compounds, like atoms and molecules. This energy is released when a chemical reaction takes place. Usually, once chemical energy has been released from a substance, that substance is transformed into a completely new substance.
Now , we know energy is Force * displacement and chemical means a phenomenon relating to chemistry. Therefore , does chemical energy mean that when separation between atoms in a molecule increase or decrease ., Chemical energy increases or decreases.
2)chemical energy released as heat ? 1st paragraph
- Chemical energy released as heat ? 1st paragraph
Not getting whatWhat does this mean
3)What does it mean by thermodynamics is not concerned by how and at what rate these transformation are carried out ?
- What does it mean by
thermodynamics is not concerned by how and at what rate these transformation are carried out ?
At what rate change in temperature happened. I.e did temp change in even proportion every second or uneven ? Doesn’t matter in this chapter. Is this what this statement mean to say.
