8. The following constant pressure process occurs spontaneously when the system, initially at a different temperature from its surroundings, attains the same final temperature as the surroundings. Ar(g, 28 °C, 1 atm) ⟶ Ar(g, 70 °C, 1 atm) Which of the following statements about this process is/are correct? You may choose more than one, or none, of the statements.
Thermochemistry
Thermochemistry can be considered as a branch of thermodynamics that deals with the connections between warmth, work, and various types of energy, formed because of different synthetic and actual cycles. Thermochemistry describes the energy changes that occur as a result of reactions or chemical changes in a substance.
Exergonic Reaction
The term exergonic is derived from the Greek word in which ‘ergon’ means work and exergonic means ‘work outside’. Exergonic reactions releases work energy. Exergonic reactions are different from exothermic reactions, the one that releases only heat energy during the course of the reaction. So, exothermic reaction is one type of exergonic reaction. Exergonic reaction releases work energy in different forms like heat, light or sound. For example, a glow stick releases light making that an exergonic reaction and not an exothermic reaction since no heat is released. Even endothermic reactions at very high temperature are exergonic.
8. The following constant pressure process occurs spontaneously when the system, initially at a different temperature from its surroundings, attains the same final temperature as the surroundings.
Ar(g, 28 °C, 1 atm) ⟶ Ar(g, 70 °C, 1 atm)
Which of the following statements about this process is/are correct? You may choose more than one, or none, of the statements.
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The entropy of the system increases: ΔS > 0. |
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The entropy of the surroundings increases: ΔSsurr > 0. |
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The entropy of the universe increases: ΔSuniv > 0. |
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Work is done by the system on the surroundings. |
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Heat flows from the system into the surroundings. |
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