For a particular reaction, δ h ∘ = − 93.8 kj and δ s ∘ = − 156.1 j/k. assuming these values change very little with temperature, at what temperature does the reaction change from nonspontaneous to spontaneous?

To solve this problem it is necessary to apply the concepts related to Gibbs free energy and spontaneity

At constant temperature and pressure, the change in Gibbs free energy is defined as

Where,

H = Entalpy

T = Temperature

S = Entropy

When the temperature is less than that number it is negative meaning it is a spontaneous reaction. is also always 0 when using single element reactions. In numerical that implies

At the equation then,

}

Therefore the temperature changes the reaction from non-spontaneous to spontaneous is 600.89K

weather forecasts are done by collecting data about the current state of the atmosphere mainly the temperature, humidity and wind and using meteorology, to determine the atmosphere that evolves over time. the h and l mean the high and low pressure. the red strip is a warm front. the blue strip is a cold front. the blue and red strip is a stationary front. the purple strip is a occluded front.

explanation: