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When H and S are both positive
Paul Wyman
Heather Tremblay
When H is positive and S is negative
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What determine whether a reaction took place?
Whether a reaction took place is determined by the change in chemical composition, the formation of new substances, the release of energy or heat, and the color change or visible evidence of a chemical change. These factors indicate that a chemical reaction has occurred.
How does the entropy change in the reaction 2C3H6 (g) plus 9O (g) 6CO2(g)?
The entropy increase in this reaction.
What is the name and symbol of the single thermodynamic quantity which determines whether or not a reaction is spontaneous?
The name of the single thermodynamic quantity is Gibbs free energy (G). The symbol for Gibbs free energy is ĪG (delta G). The sign of ĪG determines whether a reaction is spontaneous (negative ĪG) or non-spontaneous (positive ĪG).
How will temperature affect the spontaneity of a reaction positive delta h and delta s?
∆G = ∆H - T∆S and for it to be spontaneous, ∆G should be negative. If both ∆H and ∆S are positive, in order to get a negative ∆H, the temperature needs to be elevated in order to make the ∆S term greater than the ∆H term. So, I guess the answer would be "the higher the temperature, the more likely will be the spontaneity of the reaction."
How do you determine whether a reaction is spontaneous or non spontaneous?
A reaction is spontaneous if the Gibbs free energy change (ĪG) is negative. This means that the reaction can proceed without external energy input. In contrast, a reaction is nonspontaneous if ĪG is positive, meaning external energy is needed for the reaction to occur.
According to the Gibbs free energy equation G H - TS when is a reaction always spontaneous?
when H is negative and S is positive
What conditions make G always negative?
G is always negative when H is negative and S is positive.
Is free energy of cell reaction positive when emf of cell reaction is positive?
No, the free energy of a cell reaction is negative when the emf of the cell reaction is positive. This is because a positive emf indicates that the reaction is spontaneous and capable of performing work, resulting in a negative change in free energy.
Under what conditions is G for a reaction always positive?
When H is positive and S is negative
Will this entropy change by positive or negative N2 (g) 3h2 (g) 2nh3 (g)?
The reaction N2 (g) + 3H2 (g) ā 2NH3 (g) shows an increase in entropy because it involves an increase in the number of gaseous molecules from 2 to 4. Therefore, the entropy change for this reaction is positive.
What conditions make delta G always positive?
G is always positive when enthalpy increases and entropy decreases.
What conditions make G positive?
G is always positive when enthalpy increases and entropy decreases.
A chemical reaction has a positive H value and a positive S value Under what conditions is the reaction spontaneous?
The spontaneity of a reaction is determined by the sign of the Gibbs free energy (ĪG). If both enthalpy (H) and entropy (S) are positive, the reaction can be spontaneous at high temperatures where the TĪS term outweighs the positive ĪH term, resulting in a negative ĪG. This means the reaction will be spontaneous at elevated temperatures.
What determine whether a reaction took place?
Whether a reaction took place is determined by the change in chemical composition, the formation of new substances, the release of energy or heat, and the color change or visible evidence of a chemical change. These factors indicate that a chemical reaction has occurred.
How do you tell which is greater a negative number or a positive number?
a positive number is always greater than a negative number
Which of the following is true for the gas phase reaction shown below 2c2ho g 5o2 g 4co2 g 2h2o g Īh 2511 kj?
ΔS is positive and G is negative at all temp.Which of the following is true for the gas phase reaction shown below? 2C2H2(g) + 5O2(g) → 4CO2(g) + 2H2O(g), ΔH = -2511 kJΔS is negative and ΔG is negative at low temperatures.
What happens to the entropy in the reaction I2 s I2 g?
The entropy of the system increases during the sublimation of I2(s) to I2(g) because the randomness and disorder of the gas phase is higher compared to the solid phase. Therefore, the entropy of the reaction is positive.
