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When is the change in entropy zero?
The change in entropy is zero when a process is reversible, meaning that the system and surroundings return to their original state without any net change in entropy.
What is the relationship between the change in entropy at constant volume and the thermodynamic property of a system?
The change in entropy at constant volume is related to the thermodynamic property of a system because entropy is a measure of the disorder or randomness of a system. When there is a change in entropy at constant volume, it indicates a change in the system's internal energy and the distribution of energy within the system. This change in entropy can provide insights into the system's behavior and its thermodynamic properties.
How can one calculate the change in entropy in physics?
In physics, the change in entropy can be calculated using the formula S Q/T, where S represents the change in entropy, Q is the heat transferred, and T is the temperature in Kelvin.
What is the relationship between entropy and free energy in thermodynamics?
In thermodynamics, entropy and free energy are related through the equation G H - TS, where G is the change in free energy, H is the change in enthalpy, T is the temperature in Kelvin, and S is the change in entropy. This equation shows that the change in free energy is influenced by both the change in enthalpy and the change in entropy.
What is the change of entropy when an icicle melts at 2 degrees Celsius?
The change in entropy when an icicle melts at 2 degrees Celsius is positive. This is because the solid ice undergoes a phase change to become liquid water, increasing the randomness and disorder of the molecules, leading to a higher entropy.
What causes the entropy to change when the solute dissolves in a solvent?
The solute becomes less ordered
When sugar dissolves es in water is the change in entropy positive or negative?
When sugar dissolves in water, the change in entropy is generally positive. This is because the sugar molecules become more dispersed in the solvent, increasing the disorder or randomness of the system.
Entropy change for dissolving salt in water?
This question isn't very complete, but if you meant what is the solute or solvent, the water would be the solvent because there is more water than salt. In this case, the salt is the solute. If there...
In thermo-dynamics such a change causes an increase in entropy?
irriversible
Energy transfer that causes a change in temperatureWhat term refers to an energy transfer that causes a change in temperature?
Entropy
When a substance dissolves it undergoes a chemical change physical change molecular change?
When a substance dissolves, it undergoes a physical change, not a chemical change. This is because the molecules of the solute are dispersed in the solvent but do not undergo any chemical reactions. The process of dissolving is a result of the attraction between the solute and solvent molecules.
How does an increase in surface area help a solute dissolve more quickly?
Not necessarily just changing the surface area causes the rate to change. Changing the ratio of surface area volume changes the rate at which a solute dissolves in a solvent. If the surface area is larger and the volume of a solute is smaller or the same, then the rate at which the solute dissolves in a solvent increases. If the surface area is smaller and the volume of the solute is larger or the same, then the rate at which the solute dissolves in a solvent decreases.
Why does Milo dissolve in hot milk?
it is a physical change not a chemical change. milo dissolves into hot milk because it is a super saturated solvent.
What phase change happens when something dissolves?
Dissolving a substance does not involve a phase change.
What is the enthalpy and entropy change when ammonium chloride is dissolved in water?
When ammonium chloride dissolves in water, it absorbs energy from the surroundings, resulting in a positive enthalpy change (endothermic process). The dissolution also leads to an increase in disorder or randomness, resulting in a positive entropy change.
How does the entropy change in the reaction 2c3h6g 9o2g 6co2g 6h2og?
The entropy change in a reaction can be calculated by comparing the entropy of the products to the entropy of the reactants. Without specific entropy values provided, it is difficult to determine the exact change. However, in general, the entropy change is positive in reactions where the products have higher entropy than the reactants, indicating an increase in disorder.
How do you calculate the enthalpy change of a solution (H solution)?
To calculate the enthalpy change of a solution (H solution), you can use the formula: H solution H solute H solvent H mixing Where: H solute is the enthalpy change when the solute dissolves in the solvent H solvent is the enthalpy change when the solvent changes state (if applicable) H mixing is the enthalpy change when the solute and solvent mix By adding these three components together, you can determine the overall enthalpy change of the solution.
