# A helium balloon has a pressure of 40 psi at 20°C. What will the pressure be at 40°C?

Dec 27, 2017

42,7 psi

#### Explanation:

Pressure is proportional with absolute temperature (273 +t) so you must calculate:
${P}_{2} / {P}_{1} = {T}_{2} / {T}_{1}$
${P}_{2} = \frac{313 K}{293 K} \times 40$ psi =42,7 psi