Question

The triple point of carbon dioxide is $216.55\, K$ the corresponding temperature on the Celsius and Fahrenheit scale respectively are

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

Answer 1

Answer: (D)

As $T_{C}=\left(T-273\right)^{\circ}C$
$=216.55-273=-56.45^{\circ}C$
Also, $T_{F}=\frac{9}{5}T_{C}+32$
$=\frac{9}{5} \times\left(-56.45\right)+32$
$=-101.61+32=-69.61^{\circ}F$