What are the products in this chemical reaction?
They indicate the number of each chemical species that reacts or is formed. Methane and oxygen (oxygen is a diatomic — two-atom — element) are the reactants, while carbon dioxide and water are the products. All the reactants and products are gases (indicated by the g’s in parentheses).
What are the two types of chemical reactions?
Types of Chemical Reactions: Single- and Double-Displacement Reactions
- Recognize chemical reactions as single-replacement reactions and double-replacement reactions.
- Use the periodic table, an activity series, or solubility rules to predict whether single-replacement reactions or double-replacement reactions will occur.
What are the symbols of chemical equation?
Writing Chemical Equations
| Symbol | Description |
|---|---|
| → | yield sign; separates reactants from products |
| ⇌ | replaces the yield sign for reversible reactions that reach equilibrium |
| Pt→ | formula written above the arrow is used as a catalyst in the reaction |
| Δ→ | triangle indicates that the reaction is being heated |
What is enthalpy and entropy?
Enthalpy is the amount of internal energy contained in a compound whereas entropy is the amount of intrinsic disorder within the compound. Enthalpy is zero for elemental compounds such hydrogen gas and oxygen gas; therefore, enthalpy is nonzero for water (regardless of phase).
Is enthalpy a state function?
Many thermodynamic quantities, including temperature, energy, and enthalpy, are state functions because changes in their values depend only on their initial and final values.
What is enthalpy state function?
Enthalpy is considered a state function because its current value will only depend upon the final and initial values of heat in a reaction, but not the path or process that occurred for it to reach that value.
Why is enthalpy a state function and heat is not?
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.
Is work a path or state function?
State functions depend only on the state of the system, not on the path used to get to that state. 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.
How is work path function?
Two important examples of a path function are heat and work. These two functions are dependent on how the thermodynamic system changes from the initial state to final state. These two functions are introduced by the equation ΔU which represents the change in the internal energy of a system.
Which is the state 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.
Is work done dependent on path?
The work done by a non-conservative force depends on the path taken. Equivalently, a force is conservative if the work it does around any closed path is zero: Wclosed path=∮→Econs⋅d→r=0.
Is conservative force constant?
A conservative force exists when the work done by that force on an object is independent of the object’s path. Instead, the work done by a conservative force depends only on the end points of the motion. An example of a conservative force is gravity.
Is QA a path function?
Path function: Their magnitudes depend on the path followed during a process as well as the end states. Work (W), heat (Q) are path functions. Point Function: They depend on the state only, and not on how a system reaches that state. All properties are point functions.
What is a closed path called?
…than once is called a circuit, or a closed path. A circuit that follows each edge exactly once while visiting every vertex is known as an Eulerian circuit, and the graph is called an Eulerian graph.
How do you call a closed current path?
A closed path for the flow of electric current is called electric circuit.
Is a closed path through which electric charges flow?
Electricity
| A | B |
|---|---|
| closed path through which electrons flow | circuit |
| accumulation of electric charges on an object | static electricity |
| circuit with more than one path | parallel circuit |
| tendency of a material to oppose electron flow | resistance |