Oxygen gas is used to fill a balloon and a short time later the balloon is observed to only be half full. Explain this observation.
Responses
A The balloon leaks and the temperature went down.The balloon leaks and the temperature went down.
B More oxygen was added to the balloon and the temperature went up.More oxygen was added to the balloon and the temperature went up.
C The pressure outside the balloon went down and the pressure inside went down.The pressure outside the balloon went down and the pressure inside went down.
D The pressure outside the balloon went down and the temperature inside went up
C The pressure outside the balloon went down and the pressure inside went down.
C The pressure outside the balloon went down and the pressure inside went down.
To explain why the balloon is observed to be only half full after some time, we need to consider the behavior of gases and the factors that affect them.
Option A suggests that the balloon may be leaking and the temperature has gone down. This would cause the balloon to deflate over time, but it does not explain why it is only half full. Therefore, option A is not the correct explanation.
Option B suggests that more oxygen was added to the balloon and the temperature went up. However, adding more oxygen to the balloon would actually cause it to expand and become more full, rather than being half full. So, option B is also not the correct explanation.
Option C states that the pressure outside the balloon went down and the pressure inside went down. This explanation is closer to the correct one. When the pressure outside the balloon decreases, the gas inside the balloon expands to fill the decreased pressure. So, if the pressure both inside and outside the balloon decreases, the balloon will appear less full. Therefore, option C is the correct explanation.
Option D suggests that the pressure outside the balloon went down and the temperature inside went up. While a decrease in pressure outside the balloon would cause it to expand, an increase in temperature would actually cause the gas inside to expand as well, making the balloon more full rather than half full. Hence, option D is not the correct explanation.
In conclusion, the correct explanation for the observed half full balloon after some time is that the pressure outside the balloon decreased, causing the gas inside to also decrease in pressure and thereby making the balloon appear less full.