A balloon initially has a volume of 45 L at sea level, where temperature is 25∘C and the pressure is 1.0 atm. It rises to an elevation of 2.0 km, where the temperature is 5.0∘C and the pressure is 0.78 atm. What is the balloon's volume at this height?

Respuesta :

Answer:

53.8 L

Step-by-step explanation:

We can use the ideal gas formula that relates pressure, volume and temperature:

[tex]\frac{P_1 V_1}{T_1} = \frac{P_2 V_2}{T_2}[/tex]

where P1 = initial pressure = 1.0 atm

V1 = initial volume = 45 L

T1 = initial temperature = 25°C = 25 + 273 = 298 K

P2 = final pressure = 0.78 atm

V2 = final volume

T2 = final temperature = 5.0°C = 5 + 273 = 278 K

Therefore, the final volume will be:

[tex]\frac{1 * 45}{298} = \frac{0.78 * V_2}{278}\\\\0.151 = 0.002806 V_2\\\\=> V_2 = 0.151 / 0.002806\\\\V_2 = 53.8 L[/tex]

Its volume is 53.8 L