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iheartfood
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#1: When you heat an airfilled balloon, what happens inside with regard to the movement of air molecules?
A. The collisions of air molecules against the wall of the balloon are weaker.
B. The collisions of air molecules against the wall of the balloon are stronger.
C. The collisions of air molecules against the wall of the balloon do not change.
**my answer: B
is that right?? @aaronq :)
 one year ago
 one year ago
iheartfood Group Title
#1: When you heat an airfilled balloon, what happens inside with regard to the movement of air molecules? A. The collisions of air molecules against the wall of the balloon are weaker. B. The collisions of air molecules against the wall of the balloon are stronger. C. The collisions of air molecules against the wall of the balloon do not change. **my answer: B is that right?? @aaronq :)
 one year ago
 one year ago

This Question is Closed

iheartfood Group TitleBest ResponseYou've already chosen the best response.0
#2: You have 0.5 L of air at 203 K in an expandable container at constant pressure. You heat the container to 273 K. What is the volume of air? A. 0.37 L B. 0.67 L C. 1.5 L D. 0.25 L **myanswer: B. 0.67 L is that right?
 one year ago

iheartfood Group TitleBest ResponseYou've already chosen the best response.0
#3: You place a balloon in a closed vacuum chamber at standard temperature and pressure (STP). You decrease the chamber temperature by half but keep the pressure constant. What happens to the balloon? A. It reduces in size by half. B, It stays the same volume. C. It doubles in volume. D. It expands to four times the original volume. *my answer: A is that irhgt?
 one year ago

aaronq Group TitleBest ResponseYou've already chosen the best response.1
they both are correct
 one year ago

aaronq Group TitleBest ResponseYou've already chosen the best response.1
3 is good too
 one year ago

iheartfood Group TitleBest ResponseYou've already chosen the best response.0
#4: A balloon contains 0.5 L of air at 273 K. Its volume increases to volume of 0.75 L at constant pressure. What is the temperature of air inside the balloon? A. 137 K B. 182 K C. 205 K D. 410 K **my answer: D. 410 K is that right?? and yayy :)
 one year ago

aaronq Group TitleBest ResponseYou've already chosen the best response.1
for #4, if you increase the volume the temp will go down
 one year ago

iheartfood Group TitleBest ResponseYou've already chosen the best response.0
#5: This question appears on a quiz. "A 1.0 L balloon has a temperature of 273 K. When the temperature changes to 30°C, what is the volume?" A student answers 0.11 L. Which of the following explanations is true? (C = K 273; K = C + 273.) A. The student did not solve for the correct parameter, and the answer should be 1.11 L. B. The student did not solve for the correct parameter, and the answer should be 0.90 L. C. The student did not put the temperatures in the same units, and the answer should be 0.90 L. D. The student did not put the temperatures in the same units, and the answer should be 1.11 L. **My answer: D not too sure tho... is that right? :/
 one year ago

iheartfood Group TitleBest ResponseYou've already chosen the best response.0
so #4 is wrong then>?? idk what it is :(
 one year ago

aaronq Group TitleBest ResponseYou've already chosen the best response.1
for #4, you use P1V1=P2V2 plug the numbers in and you can't ever get a wrong answer.. unless you put them in the wrong place
 one year ago

iheartfood Group TitleBest ResponseYou've already chosen the best response.0
i don't even know haha :/ like how do u plug them in? cuz i definitely didn't do it right :/
 one year ago

aaronq Group TitleBest ResponseYou've already chosen the best response.1
for #5, the "student" divided 30/273.. so i would say wrong parameters.. idk how someone would do that though
 one year ago

iheartfood Group TitleBest ResponseYou've already chosen the best response.0
like what goes where?
 one year ago

iheartfood Group TitleBest ResponseYou've already chosen the best response.0
wait so the answer to #5 is this? A. The student did not solve for the correct parameter, and the answer should be 1.11 L.
 one year ago

aaronq Group TitleBest ResponseYou've already chosen the best response.1
P=pressure V= volume on one side is the set for the system at one point, then across the equal sign for the change
 one year ago

aaronq Group TitleBest ResponseYou've already chosen the best response.1
for #5, 1.11L is not the correct answer...
 one year ago

iheartfood Group TitleBest ResponseYou've already chosen the best response.0
so #5 is B. The student did not solve for the correct parameter, and the answer should be 0.90 L. ???? and I'm confused about #4 now haha :/ could u pls show me how u do it? :/
 one year ago

iheartfood Group TitleBest ResponseYou've already chosen the best response.0
heres how i think it is based off what u said.. :/ .5/273=.75/x and solve for x? is that right?
 one year ago

iheartfood Group TitleBest ResponseYou've already chosen the best response.0
and i got x=409.5 which is about 410K.. which is D.. but you said that #4 isn't D right?? :/ so i don't know what to do now :( @aaronq what do i do for it then?
 one year ago

aaronq Group TitleBest ResponseYou've already chosen the best response.1
no they're not being divided
 one year ago

aaronq Group TitleBest ResponseYou've already chosen the best response.1
PV=nRT it's basically based off the ideal gas law, PV/nRT of one system equals PV/nRT of the other \[\frac{ P _{1}V _{1} }{ n _{1}RT _{1} }=\frac{ P _{2}V _{2} }{ n _{2}RT _{2} }\] when all the variables like T or n are constant, it simplifies to P1V1=P2V2
 one year ago

iheartfood Group TitleBest ResponseYou've already chosen the best response.0
okay so how do i apply that with the values that they give me?
 one year ago

aaronq Group TitleBest ResponseYou've already chosen the best response.1
so for number 4, (0.5 L)(273 K)= (0.75 L)(T) (0.5 L)(273 K)/(0.75 L) = T
 one year ago

iheartfood Group TitleBest ResponseYou've already chosen the best response.0
oh so i get 182.. which is answer choice B right?
 one year ago

iheartfood Group TitleBest ResponseYou've already chosen the best response.0
and was #5's answer B. The student did not solve for the correct parameter, and the answer should be 0.90 L. ??
 one year ago

iheartfood Group TitleBest ResponseYou've already chosen the best response.0
yes to both 4 and 5? haha
 one year ago

aaronq Group TitleBest ResponseYou've already chosen the best response.1
4 yes, 5 idk the student did both, not change his temperature units, and divided the wrong way...
 one year ago

iheartfood Group TitleBest ResponseYou've already chosen the best response.0
okay... so which would u go with for 5?? cuz idk haha
 one year ago

aaronq Group TitleBest ResponseYou've already chosen the best response.1
i would go with C, because the student still got an answer in litres... somehow lol
 one year ago

iheartfood Group TitleBest ResponseYou've already chosen the best response.0
okay haha :) thanks!!!:)
 one year ago

aaronq Group TitleBest ResponseYou've already chosen the best response.1
no prob! :)
 one year ago
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