Respuesta :
The following are the processes that do not affect the entropy of the universe:
1. A process run infinitesimally gradually at equilibrium and reversed to its original state.
2. A constant composition mixture of solid and liquid water at standard temperature and pressure.
3. The motion of a frictionless pendulum.
The following are the processes that elevate the entropy of the universe:
1. A bag of red marbles and a bag of green marbles dumped together on a table top.
2. Ice melting to water above the melting point.
3. Hydrogen peroxide slowly decomposing into oxygen and water.
Entropy signifies disorder, that is if randomness of the molecules enhances then the entropy elevates.
Then the processes that affect entropy are: option 4,5,6
Further explanation
Entropy (with the symbol S) in thermodynamics indicates the degree of system disorder
Entropy like other thermodynamic terms can only be calculated from the initial and final changes
Entropy will also change in the process of changing energy forms
The value of ΔS ° can be calculated from standard entropy data
∆S ° (reaction) = ∑S ° (product) - ∑ S ° (reagent)
Let's look the option
- 1. A process run infinitesimally gradually at equilibrium and reversed to its original state.
A process in equilibrium does not cause changes in the nature of thermodynamics
- 2. A constant composition of mixture of solid and liquid water at standard temperature and pressure.
The same composition shows the degree of regularity of the system (STP at 0 C and 1 atm)
- 3. The motion of a frictionless pendulum.
The pendulum will move continuously because friction is ignored
- 4. A bag of red marbles and a bag of green marbles dumped together on a table top.
There will be a change of potential energy into kinetic energy from marbles
- 5. Ice melting to water above the melting point.
Heat changes occur, where the system absorbs heat
- 6. Hydrogen peroxide is slowly decomposing into oxygen and water
Decomposition reaction occurs, in which heat is needed to decompose Hydrogen peroxide
Then the processes that affect entropy are: 4,5,6
Learn more
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Keywords: the entropy of the universe