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For a process that occurs at constant temperature does the change in Gibbs free energy depend on changes in the enthalpy and entropy of the system?
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Predict whether the changes in enthalpy entropy and free energy will be positive or negative for the freezing of water and explain your predictions How does temperature affect the spontaneity?
Enthalpy- positive Entropy- decreasing Free energy- negative
When graphing enthalpy and entropy what variables are included?
Temperature and energy are two of the variables included when graphing enthalpy and entropy. Enthalpy is made up of the energy, pressure, and volume of a system. Entropy is a way to determine the different ways energy can be arranged.
What happens to entropy when pressure decreases?
When pressure decreases, entropy increases. Increases in entropy correspond to pressure decreases and other irreversible changes in a system. Entropy determines that thermal energy always flows spontaneously from regions of higher temperature to regions of lower temperature, in the form of heat.
What is Troutons constant?
From the Wikipedia article (linked to the left of this answer): "Trouton’s rule states that the entropy of vaporization is almost the same value, about 87-88 J K-1 mol-1, for various kinds of liquids. The entropy of vaporization is defined as the ratio between the enthalpy of vaporization and the boiling temperature." This value of 87-88 J K-1 mol-1, Trouton's constant, is also about equal to 10.5 * R, where R is the universal gas constant (R = 8.314472 J K-1 mol-1).
What are the units of enthalpy?
The units for entropy are joules per kelvin (J K-1)
Predict whether the changes in enthalpy entropy and free energy will be positive or negative for the freezing of water and explain your predictions How does temperature affect the spontaneity?
Enthalpy- positive Entropy- decreasing Free energy- negative
How is energy permantely lost?
To feed the rise in Entropy. Enthalpy is a constant, but Entropy is always increasing.
What kind of changes contribute to spontaneity?
An increase in entropy.
When graphing enthalpy and entropy what variables are included?
Temperature and energy are two of the variables included when graphing enthalpy and entropy. Enthalpy is made up of the energy, pressure, and volume of a system. Entropy is a way to determine the different ways energy can be arranged.
What is the definition of enthalpy and entropy?
Enthalpy is the amount of energy released or used when kept at a constant pressure. Entropy refers to the unavailable energy within a system, which is also a measure of the problems within the system.
Is polymerization endothermic or exothermic?
Exothermic, because the reaction enthalpy must be negative. With polymerization, the entropy decreases. The Gibbs energy has to be negative. Thus negative reaction enthalpy. Gibbs energy = reaction enthalpy - temperature*entropy
What are thermodynamics?
Thermodynamic properties are specific volume, density, pressure, and temperature. Other properties are constant pressure, constant volume specific heats, Gibbs free energy, specific internal energy and enthalpy, and entropy.
What could make G become negative at a given enthalpy and entropy?
Changing the temperature
What characteristics of a substance is NOT affected by enthalpy and entropy?
Pressure is not affected by enthalpy and entropy.pressure
What is the value equal to the enthalpy minus temperature times entropy?
free energy. this is gibbs free energy in biological systems
Is Delta S is the change in enthalpy a measure of randomness?
No, delta s is the change in entropy. Delta H is the change in enthalpy, the amount of heat used in a system. Entropy and enthalpy are different, but closely related.
What affects the magnitude of delta G?
Delta G is the change in Gibbs free energy. Gibbs Free energy is defined as:- G= H-TS at constant temperature so the factors ar the change in enthalpy (H) and entropy (S)
