Question

$( IE )_{1}$ of $Cs$ is $376 \,kJ \,mol ^{-1} $ Maximum number of $Cs ^{+}$ ions that can be produced per joule of energy absorbed by a sample of gaseous Cs-atom is

• A. $6.02 \times 10^{23}$
• B. $6.01 \times 10^{23}$
• C. $1.60 \times 10^{18}$
• D. $1.60 \times 10^{15}$

Answer 1

Answer: (C)

$376 \times 10^{3} \,J$ of energy absorbed cause ionisation of $N _{0}$ atoms to $Cs ^{+}$

$1 \,J$ of energy absorbed causes ionisation of

$=\frac{N_{0}}{376 \times 10^{3}}$ atoms to $Cs ^{+}$

$=\frac{6.02 \times 10^{23}}{376 \times 10^{3}}=1.60 \times 10^{18}$ atoms to $Cs ^{+}$