Which equation represents the atomization of iodine?
Correct answer: B. 1/2 I2(s)→I(g)
- A. 1/2 I(sp)→ I(l)
- B. 1/2 I2(s)→I(g)
- C. I2(l)→2l(g)
- D. I2(g)→2l(g)
Explanation
The standard enthalpy of atomization of an element is the amount of heat absorbed when one mole of gaseous atoms are formed from the element under standard conditions i 298K and one-atmosphere pressure.Examples:The standard enthalpy of atomization of hydrogen is given below(i) ½ H2(g) → H(g) ΔH:-+218kJmol(ii) ½ l2(s) → l(g) ΔHat =+ve
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About Thermochemistry and Energetics of Chemical Reactions
Thermochemistry measures energy changes in chemical reactions and distinguishes exothermic from endothermic processes. Work covers systems, surroundings and state functions, internal energy, the first law of thermodynamics, enthalpy and Hess's law, including the sign conventions used when heat enters or leaves a system.
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