A balloon was filled to 1.25L at 25.2°C. 0.235g of helium was used to fill it....

Question

Question

A balloon was filled to 1.25L at 25.2°C. 0.235g of helium was used to fill it. What is the pressure?

R=0.8206L·atm/°C·mole

science chemistry

Answer 1

Answer #1

Applying, ideal gas equation, PV= nRT

Here ,n = no. of moles = 0.235/4.0 =0.05875 mole ( Molar mass of helium =4)

V= 1.25 L

T= 25.2°c

P=n/V *RT

= 0.05875mole/1.25 Litre * 0.8206 L.atm/°C.mole*25.2°c

=0.047*0.8206*25.2 atm

=0.9719 atm.

Thus, pressure = 0.9719 atm.

please upvote

Add a comment

Answer 2

Similar Homework Help Questions

Helium-filled balloons are used to carry scientific instruments high into the atmosphere. Suppose a balloon is...

Helium-filled balloons are used to carry scientific instruments high into the atmosphere. Suppose a balloon is launched when the temperature is 22.5 °C, and the barometric pressure is 751 mm Hg. If the balloon’s volume is 4.34×104 L (and no helium escapes from the balloon), what will the volume be at a height of 20 miles, where the pressure is 76.0 mm Hg, and the temperature is -33.0 °C
Fun with a helium balloon A loosely filled balloon contains 4.5 liters of helium gas at...

Fun with a helium balloon A loosely filled balloon contains 4.5 liters of helium gas at atmospheric pressure (PA = 101 kPa) and room temperature T = 20 C. The gas in the balloon is then heated to body temperature, 37 C, by a student. (a) The pressure inside the balloon changes very little during the heating process. What is the change in the volume of the balloon? (b) How much work does the expanding balloon do on its environment?...
A weather balloon is filled with helium to a volume of 350 L at 12 ∘C...

A weather balloon is filled with helium to a volume of 350 L at 12 ∘C and 747 mmHg . The balloon ascends to an altitude where the pressure is 499 mmHg and the temperature is -36 ∘C What is the volume of the balloon at this altitude? Express your answer using three significant figures.

a weather balloon has a volume of 2.57 L when filled with helium at 22.6°c at...

a weather balloon has a volume of 2.57 L when filled with helium at 22.6°c at a pressure of 727.7 torr. what is the new volume of the balloon (in liters) if the balloon rises to a point where the air pressure is 476.6 tore and the temperature is 3.9°c
A balloon filled with 35.6 moles of helium has a volume of 856 L at 0.0°C...

A balloon filled with 35.6 moles of helium has a volume of 856 L at 0.0°C and 1.00 atm pressure. The temperature of the balloon is increased to 43.0°C as it expands to a volume of 967 L, the pressure remaining constant. Calculate q, w, and ΔE for the helium in the balloon. (Given, the molar heat capacity for helium gas is 20.8 J/°C · mol, and 1 L·atm = 101.3 J) (Show your work)
QUESTION 4 A 0.973 mole sample of helium gas at 25 C filled a balloon to...

QUESTION 4 A 0.973 mole sample of helium gas at 25 C filled a balloon to a volume of 3.87 L. What is the pressure of the balloon? 6.15 atm 1.12x103 atm 74.9 atm 0.516 atm

a birthday party balloon is filled with 0.045 grams of helium gas. if the balloon takes...

a birthday party balloon is filled with 0.045 grams of helium gas. if the balloon takes up 750.ml of space and has a pressure of 325 mmhg. what is the teperature inside the balloon
A weather balloon is filled with helium to a volume of 270 L at 29 ∘C...

A weather balloon is filled with helium to a volume of 270 L at 29 ∘C and 765 mmHg . The balloon ascends to an altitude where the pressure is 466 mmHg and the temperature is -42 ∘C. You may want to reference (Pages 233 - 234) Section 8.8 while completing this problem. Part A What is the volume of the balloon at this altitude? Express your answer using three significant figures.
A balloon is filled with helium gas. For the question(s) that follow, select the letter of the balloon diagram that corr...

A balloon is filled with helium gas. For the question(s) that follow, select the letter of the balloon diagram that corresponds to the given change in conditions. The temperature is changed from 50 °C to -150 °C at constant pressure. A balloon is filled with helium gas. For the question(s) that follow, select the letter of the balloon diagram that corresponds to the given change in conditions. The temperature is changed from 50 °C to -150 °C at constant pressure....

1. A weather balloon is filled with helium to a volume of 300 L at 33...

1. A weather balloon is filled with helium to a volume of 300 L at 33 ∘C and 761 mmHg . The balloon ascends to an altitude where the pressure is 454 mmHg and the temperature is -38 ∘C. What is the volume of the balloon at this altitude?