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Which equation represents the process that occurs when the standard enthalpy of atomisation of iodine is measured? A $\frac{1}{2}I_2(s) \rightarrow I(g)$ B $I_2(s) \rightarrow 2I(g)$ C $\frac{1}{2}I_2(g) \rightarrow I(g)$ D $I(g) \rightarrow 2I(g)$ - AQA - A-Level Chemistry - Question 14 - 2018 - Paper 3
Question 14
Which equation represents the process that occurs when the standard enthalpy of atomisation of iodine is measured? A $\frac{1}{2}I_2(s) \rightarrow I(g)$ B $I_2(... show full transcript
Worked Solution & Example Answer:Which equation represents the process that occurs when the standard enthalpy of atomisation of iodine is measured? A $\frac{1}{2}I_2(s) \rightarrow I(g)$ B $I_2(s) \rightarrow 2I(g)$ C $\frac{1}{2}I_2(g) \rightarrow I(g)$ D $I(g) \rightarrow 2I(g)$ - AQA - A-Level Chemistry - Question 14 - 2018 - Paper 3
Step 1
Identify the correct equation for standard enthalpy of atomisation
Answer
The standard enthalpy of atomisation refers to the energy change when one mole of a substance in its standard state is converted to gaseous atoms. The correct equation for measuring the standard enthalpy of atomisation of iodine is:
Answer: Option B:
This equation shows one mole of solid iodine converting into two moles of gaseous iodine atoms.