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When H and S are both positive
What else can I help you with?
What determine whether a reaction took place?
Use the following equation: delta G = delta H - T*deltaS. A reaction is spontaneous if delta G is negative. A reaction will always be spontaneous (under any temperature) only if the change in enthalpy (delta H) is negative and the change in entropy (delta S) is positive. If this is not the case, the reaction will only be spontaneous (negative delta G) for a range of temperatures (or could be always non-spontaneous)
What does a positive value of delta G mean for a reaction?
A positive value of delta G (ΔG) indicates that a reaction is non-spontaneous under standard conditions, meaning it requires an input of energy to proceed. In this case, the products have higher free energy than the reactants, suggesting that the reaction is unfavorable in its current direction. Therefore, the reaction is more likely to occur when coupled with a spontaneous process or under different conditions that favor the formation of products.
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 ΔG (delta G). The sign of ΔG determines whether a reaction is spontaneous (negative ΔG) or non-spontaneous (positive ΔG).
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."
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) → 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 (ΔG). If both enthalpy (H) and entropy (S) are positive, the reaction can be spontaneous at high temperatures where the TΔS term outweighs the positive ΔH term, resulting in a negative ΔG. This means the reaction will be spontaneous at elevated temperatures.
What determine whether a reaction took place?
Use the following equation: delta G = delta H - T*deltaS. A reaction is spontaneous if delta G is negative. A reaction will always be spontaneous (under any temperature) only if the change in enthalpy (delta H) is negative and the change in entropy (delta S) is positive. If this is not the case, the reaction will only be spontaneous (negative delta G) for a range of temperatures (or could be always non-spontaneous)
How do you tell which is greater a negative number or a positive number?
a positive number is always greater than a negative number
What is the relationship between the change in Gibbs free energy (G) and the spontaneity of a chemical reaction?
The relationship between the change in Gibbs free energy (G) and the spontaneity of a chemical reaction is that a negative G indicates that the reaction is spontaneous, meaning it can occur without outside intervention. Conversely, a positive G indicates that the reaction is non-spontaneous and requires external energy input to proceed.
What is the significance of the standard Gibbs free energy change (G') in determining the feasibility of a chemical reaction?
The standard Gibbs free energy change (G') is important in determining if a chemical reaction is feasible because it indicates whether the reaction will occur spontaneously. If G' is negative, the reaction is likely to proceed forward without added energy. If G' is positive, the reaction is unlikely to occur without external energy input.
