Question

A hot air balloon, initially an expandable sphere 10 meters in radius, contains 100 kg of...

A hot air balloon, initially an expandable sphere 10 meters in radius, contains 100 kg of helium at a temperature of 25 degrees Centigrade. 1000 KJoules of heat are transferred to the gas. (Helium cp=5.19 kJ/(kg-K), cv=3.12 kJ/(kg-K)(Volume of a sphere = 4/3*Pi*r3)

  1. What is the final pressure in the balloon if the process takes place at constant volume?
  2. What is the final volume in the balloon if the process takes place at constant pressure?
Science   Physics   
0 0
Add a commentTranscribed image text
Next >

Homework Answers

Answer #1

0 0
Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
An expandable cube, initially 23 cm on each side contains 2.6 g of helium at 20∘C....
An expandable cube, initially 23 cm on each side contains 2.6 g of helium at 20∘C. 1000 J of heat energy are transferred to this gas. What is the final pressure if the process is at constant volume? What is the final volume if the process is at constant pressure?
A sample of gas is contained in an expandable balloon. 10 KJ of heat is transferred...
A sample of gas is contained in an expandable balloon. 10 KJ of heat is transferred to the gas which causes the balloon to expand at constant pressure. If the internal energy of the gas does not change during this process, calculate the work done and the change in volume ( in L) of the balloon. ( the pressure of the surroundings is 1030 mBar). ( 1 J= 1 Pa m^3 )
A 0.2 m3 piston-cylinder initially contains 400 K air. A heavy frictionless piston maintains a pressure...
A 0.2 m3 piston-cylinder initially contains 400 K air. A heavy frictionless piston maintains a pressure of 500 kPa abs. Then, a weakness in the cylinder wall blows out and creates a hole. Air escapes through the hole until the piston drops far enough to cover the hole. At that point, the volume is half the initial volume. During this process, 75 kJ of heat is transferred to the 100 kPa, 300 K surroundings. Using Cp = 1.005 kJ/kg-K and...
In a cylinder/piston arrangement, air is compressed in a reversible polytropic process to a final state...
In a cylinder/piston arrangement, air is compressed in a reversible polytropic process to a final state of 800 kPa, 500 K. Initially air is at 110 kPa and 25oC. During the compression process heat transfer takes place with the ambient maintained at 25oC. Assume air as an ideal gas (R =0.287 kJ/kg) and has constant specific heats of Cp = 1.004 kJ/kgK and Cv = 0.717 kJ/kgK. If the mass of air in the cylinder is 0.1286 kg, determine a)...
An ideal Diesel cycle has a cut off ratio of 2. The temperature of the air...
An ideal Diesel cycle has a cut off ratio of 2. The temperature of the air at the beginning and at the end of the compression process are 300 K and 900 K respectively. By utilizing constant specific heats, taking the specific heat ratio, k = 1.4, Cp = 1.005 kJ/kg K and Cv = 0.718 kJ/kg K. Determine the followings: (i) The compression ratio. [5 marks] (ii) The maximum cycle temperature. [5 marks] (iii) The amount of heat transferred...
A weather balloon contains 222 L of He gas at 20. °C and 760. mmHg. What...
A weather balloon contains 222 L of He gas at 20. °C and 760. mmHg. What is the volume of the balloon when it ascends to an altitude where the temperature is -40. °C and 540. mmHg? 1 What volume does 12.5 g of Ar gas at a pressure of 1.05 atm and a temperature of 322 K occupy? Would the volume be different if the sample were 12.5 g of He gas under the same conditions? How many moles...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT