Question

The triple point of carbon dioxide is $216.55K$ the corresponding temperature on the celsius and Fahrenheit scale respectively are:

• A. ${56.45}^{o}C,-{69.61}^{o}F$
• B. $-{56.45}^{o}C,{69.61}^{o}F$
• C. ${56.45}^{o}C,{69.61}^{o}F$
• D. $-{56.45}^{o}C,-{69.61}^{o}F$

Answer 1

The correct option is D $-{56.45}^{o}C,-{69.61}^{o}F$

The triple point of carbon dioxide is $T_K=216.55K$

Kelvin and Celsius scales are related as:-

$T_C=T_K-273$

$T_C=216.55-273=-{56.45}^{o}C$

Celsius and Fahrenheit scales are related as:-

$T_F=\frac{9}{5}+32$

$T_F=\frac{9}{5}\times (-56.45)+32=-{69.61}^{o}F$

Hence, option $\left(D\right)$ is correct.