AravindG
  • AravindG
some qns on heat and thermodynamics
IIT study group
  • Stacey Warren - Expert brainly.com
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chestercat
  • chestercat
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anonymous
  • anonymous
yes arvind ,what's problem
AravindG
  • AravindG
1.Two rodsof lengths L1 and L2 are made of materials having coeff of linear expansion alpha 1 and alpha 2 .If (L1-L2) is independent of temperature which of the foll is correct?
AravindG
  • AravindG
a)L1L2=alpha1/alpha2 b)L1L2=alpha1alpha2 c)L1alpha1=L2alpha2 d)none of these

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More answers

AravindG
  • AravindG
help
anonymous
  • anonymous
yes arvind ,do you know about the relation between length and temperature?
AravindG
  • AravindG
hm yes
AravindG
  • AravindG
pls giv the aanswer its been a long time
AravindG
  • AravindG
2.A bottle of water at 0 degree on surface of moon what happens?
AravindG
  • AravindG
3.If 22 gm of CO2 at 27 degree is mixed with 16gm of O2 at 37 degree the temp of mixture is?
anonymous
  • anonymous
then right two equation for them and subtract these two equation and think about which term should be zero so that it be independent of temperature.
anonymous
  • anonymous
find the number of mole for both carbon dioxide and oxygen gas. find value of Q for both and equate them and find the mixture temperature, Let the temperature be T: then
anonymous
  • anonymous
n(CO2)*Cv(CO2)*(T-27)=n(O2)*Cv(O2)*(37-T)..FIND T, here Cv(CO2)=9/7 AND Cv(O2)=7/5 n(CO2)=0.5 AND n(O2)=0.5
AravindG
  • AravindG
what abt 2nd qn?
anonymous
  • anonymous
wait..
AravindG
  • AravindG
kk cntinu
anonymous
  • anonymous
where you got this question 2?
AravindG
  • AravindG
in one of my worksheets
anonymous
  • anonymous
ok.. i am thinking about it..do you know ,what is the average temperature on the surface of the moon
AravindG
  • AravindG
nop
anonymous
  • anonymous
220 kelvin
anonymous
  • anonymous
arvind, any confusion..
anonymous
  • anonymous
second question is very interesting question.
anonymous
  • anonymous
did you get answer of first question.
anonymous
  • anonymous
answer Q1 is (c)
AravindG
  • AravindG
hey!
AravindG
  • AravindG
u der?
anonymous
  • anonymous
Q1. L1(1+alpha1*T)=L2(1+alpha2*T) or, L1-L2=(L2*alpha2-L1*alpha1)*T here L!-L2 is independent of T if (L2*alpha2-L1*alpha1)=0 solve it and get answer (c)
anonymous
  • anonymous
yes arvind
anonymous
  • anonymous
any query arvind..
AravindG
  • AravindG
k in 2nd qn i have options a)water freezes b)water boils c)water decomposes into h2 and o2 d)none of these
anonymous
  • anonymous
water freezes..(a)
AravindG
  • AravindG
is it bcoz temp less than 0 degree
anonymous
  • anonymous
yes ,the average Temperature of earth is 14deg C but on the moon surface it is 220 k=-53 degC.
anonymous
  • anonymous
what's the option of 3rd question in your worksheet
AravindG
  • AravindG
two rods of same length and material transfer a given amount of heat IN 12 S,WHEN THEY ARE JOINED END TO END bUT when they are joined lengthwise ,they will transfer same heat in same conditions in....
anonymous
  • anonymous
yes....
anonymous
  • anonymous
ok.. i am going....
AravindG
  • AravindG
tell me the time
anonymous
  • anonymous
i will back 2 o'clock..

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