QUESTION 3 One fun but very illegal thing to do with cold stuff is to make a dry

Question

QUESTION 3

One fun but very illegal thing to do with cold stuff is to make a dry ice bomb (umm, so I'm NOT recommending this -- more dangerous than fireworks). Basically, you put dry ice in an empty 2-liter bottle, close the lid, and run away. As the dry ice warms up (because the air temperature is warmer than the dry ice), the pressure in the bottle rises until it eventually explodes. Let's just talk about the air in the bottle. It starts at -78.5 degrees C. It explodes when the temperature gets to about +5 degrees C. By what factor has the pressure in the bottle increased from beginning to end?

QUESTION 4

Look up heat pumps on the internet. Would a heat pump make sense for a house in your hometown? Give specific reasons why or why not; don't just guess. Also, tell me where you're from so I know what you're talking about.

Explanation / Answer

solving question 3

using relation that pressure is directly proportional to temperature if volume is constant so

P1/P2=T1/T2

T1=194.5 K

T2=278 K

we got

P1/P2=0.6996

so

P2=1.43P1

so 1.43 times pressure will increase

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