Fluctuations in flame temperature affect the reproducibility of atomic emission

Question

Fluctuations in flame temperature affect the reproducibility of atomic emission experiments more so than atomic absorbance experiments. Which of the following statements explain this phenomenon? (21) 16. As temperature increases there is an increase in emission intensity resulting from an increase in the excited state population; the apparent concentration is greater than the actual concentration II As temperature decreases there is a decrease in emission intensity resulting from an III As temperature increases there is a decrease in emission intensity resulting from a IV As temperature decreases there is a decrease in emission intensity resulting from a e in the excited state population; the apparent concentration is greater than the actual increas concentration decrease in the excited state population; the apparent concentration is less than th concentration. decrease in the excited state population; the apparent concentration is less than the actual 8 concentration. (21) A) II and III B) I and IV C) I and III D) II and IV E) None of these statements explains this phenomenon.

Explanation / Answer

B)I and IV . As the temperature increases the excited state popualtion increases resulting in higher intensity and higher apparent concentration and the opposite occurs when the temperature decreases.

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