deltaH=28 kJ/mol, deltaS=0.109 kJ(molK)
A spontaneous reaction at 298 K is one in which the Gibbs free energy change (ΔG) is negative. This means that the reaction is energetically favorable and will proceed in the forward direction without the need for external energy input.
It is not spontaneous.
I2(s) --> I2(g); dH=62.4kJ/mol; dS=0.145kJ/mol. The reaction will favor the product at this temperature. Your entropy is positive and your enthalpy is also positive, so this reaction will not be spontaneous at all temperatures. But at room temperature, which is 298K, it will be spontaneous and proceed left to right. (this is the sublimation of iodine)
An exothermic reaction is one where heat is released to the surroundings. An example of an exothermic reaction equation at 298 K is: 2H2(g) + O2(g) -> 2H2O(l) + heat
Toward I2(s) production
A reaction will be spontaneous at 298 K if the Gibbs free energy change (ΔG) for the reaction is negative. This means that the reaction will proceed in the forward direction without requiring an external input of energy. The equation ΔG = ΔH - TΔS can be used to determine if a reaction is spontaneous at a given temperature, where ΔH is the change in enthalpy and ΔS is the change in entropy.
A spontaneous reaction at 298 K is one in which the Gibbs free energy change (ΔG) is negative. This means that the reaction is energetically favorable and will proceed in the forward direction without the need for external energy input.
To determine if a reaction is spontaneous or non-spontaneous at 298 K, we can use the Gibbs free energy equation, ΔG = ΔH - TΔS. If ΔG is negative, the reaction is spontaneous; if ΔG is positive, it is non-spontaneous. The values of ΔH (enthalpy change) and ΔS (entropy change) must be known to evaluate the spontaneity at this temperature. Without specific values for ΔH and ΔS, we cannot definitively conclude the spontaneity.
It is not spontaneous.
It is not spontaneous.
A spontaneous reaction at 298 K occurs when the change in Gibbs free energy (ΔG) is negative. This means that the reaction can proceed without the input of external energy, often driven by enthalpy (ΔH) and entropy (ΔS) changes according to the relationship ΔG = ΔH - TΔS. If ΔS is positive, it can favor spontaneity even with a positive ΔH, as long as the temperature is sufficiently high. Conversely, a negative ΔH at lower temperatures also promotes spontaneity.
I2(s) --> I2(g); dH=62.4kJ/mol; dS=0.145kJ/mol. The reaction will favor the product at this temperature. Your entropy is positive and your enthalpy is also positive, so this reaction will not be spontaneous at all temperatures. But at room temperature, which is 298K, it will be spontaneous and proceed left to right. (this is the sublimation of iodine)
it would be in ice form
Carbon dioxide (CO2) is formed from its elements (carbon and oxygen) by an exothermic reaction at 298 K and 101.3 kPa.
An exothermic reaction is one where heat is released to the surroundings. An example of an exothermic reaction equation at 298 K is: 2H2(g) + O2(g) -> 2H2O(l) + heat
Toward I2(s) production
At 298 K, the direction of a reaction is favored based on whether it is exothermic or endothermic. If the reaction is exothermic, it is favored in the direction that consumes heat, while for an endothermic reaction, it is favored in the direction that produces heat. The reaction will proceed in the direction that helps to minimize the overall energy of the system.