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Q: When is a reaction always spontaneous reaction?
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A chemical reaction has a positive H value and a positive S value Under what conditions is the reaction spontaneous?

the reaction is always spontaneous :) youre welcome =D i just took this on apex, the correct answer is the reaction is spontaneous only at high temperatures.


How do you determine whether a reaction is spontaneous or non spontaneous?

The first of two factors that determine whether a reaction is spontaneous or non-spontaneous is entropy. The second is energy. For a reaction to be spontaneous, it must have both of these factors.


Is candle burning a spontaneous or non spontaneous reaction?

Spontaneous


Is the burning of paper a spontaneous reaction?

If you hold a match to the paper, then yes, the reaction is spontaneous.


What does a positive cell voltage mean?

The reaction is spontaneous.


Are chemical reactions always spontaneous when H is negative and S is negative?

No, when H and S are both negative, the reaction will only be spontaneous below a certain temperature


What is the value of G for a reaction that is spontaneous?

The value isn't significant, but ∆G must be negative for a spontaneous reaction.


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)


Is the Uniform mixing of bromine vapor and nitrogen gas a spontaneous or non spontaneous reaction?

spontaneous


Which best describes a galvanic cell a battery containing a non spontaneous reaction a battery containing an acid and a base a battery containing a spontaneous redox reaction a battery that requires?

spontaneous redox reaction


A chemical reaction has a positive ΔH value and a positive ΔS value Under what conditions is the reaction spontaneous?

The reaction is spontaneous only at high temperatures.


How does Gibbs free energy predict spontaneous?

If G < 0, the reaction is spontaneous.