A balloon contains 10 g of Hz gas. What additional weight of argon gas ( at. Wt 40) must be added so that the balloon will have exactly zero buoyancy (i.e. so that its weight will be equal to that of an equal volume of surrounding air)? Assume ideal gas behavior; neglect the weight of the balloon itself and assume it to be impermeable and perfectly elastic. Average molecular weight of air is 29.
Kinetic Theory of Gas
The Kinetic Theory of gases is a classical model of gases, according to which gases are composed of molecules/particles that are in random motion. While undergoing this random motion, kinetic energy in molecules can assume random velocity across all directions. It also says that the constituent particles/molecules undergo elastic collision, which means that the total kinetic energy remains constant before and after the collision. The average kinetic energy of the particles also determines the pressure of the gas.
P-V Diagram
A P-V diagram is a very important tool of the branch of physics known as thermodynamics, which is used to analyze the working and hence the efficiency of thermodynamic engines. As the name suggests, it is used to measure the changes in pressure (P) and volume (V) corresponding to the thermodynamic system under study. The P-V diagram is used as an indicator diagram to control the given thermodynamic system.
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