2006-09-14 17:17:53 · 10 answers · asked by Erik R 1 in Science & Mathematics ➔ Chemistry
Because hot air rises.
Also, the gas in the balloon is already less dense than the air outside it. Less dense things go up.
These two separate things help your balloon actually take off.
2006-09-14 17:20:24 · answer #1 · answered by NicoRobin 2 · 0⤊ 0⤋
The only relevant parameters are the density and volume of air in the balloon. The buoyancy is determined by Archimedes Principle.
Case 1. Open bottom balloon. Heated air has a higher pressure per mole of gas. To equalize pressure, some air escapes so that the total mass of air in the balloon decreases. The air in the balloon has less mass than the air displaced by the balloon, so buoyancy is created.
Case 2. Sealed balloon, constant volume. Heating increases the pressure inside the balloon, but does not change the density inside. NO EFFECT
2006-09-14 18:12:04 · answer #2 · answered by d/dx+d/dy+d/dz 6 · 1⤊ 0⤋
Heating a gas causes it to expand and therefore its density drops.
The lower density gas will now be displaced by unheated gas ergo the balloon will rise.
2006-09-14 21:59:37 · answer #3 · answered by christopher N 4 · 1⤊ 0⤋
Heat rises.
2006-09-14 17:25:42 · answer #4 · answered by Anonymous · 0⤊ 0⤋
Heating the balloon will shrink the density of the air in the balloon, subsequently enhance buoyancy. evidence: if density d=n/V, utilising perfect gas regulation: PV=nRT nRT/V=P n/V=P/RT d=P/RT enhance T = decrease d.
2016-12-12 08:44:54 · answer #5 · answered by ? 4 · 0⤊ 0⤋
It becomes less dense, so can be displaced by the denser air outside the balloon.
2006-09-14 17:29:03 · answer #6 · answered by Anonymous · 0⤊ 0⤋
Simple basic logic, heat expands and cold contracts.
2006-09-14 17:26:30 · answer #7 · answered by richard c 1 · 0⤊ 0⤋
because heat rises...... this is like 4th grade science btw
2006-09-14 17:21:16 · answer #8 · answered by wonderer of life 2 · 0⤊ 0⤋
Pendantic point - that's a Physics question not a Chemistry question.
2006-09-14 17:23:46 · answer #9 · answered by dryheatdave 6 · 0⤊ 0⤋
heat rises...
2006-09-14 23:16:55 · answer #10 · answered by Felix Arcanus 5 · 1⤊ 0⤋