Question

some qns on heat and thermodynamics

Answer 1

yes arvind ,what's problem

Answer 2

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?

Answer 3

a)L1L2=alpha1/alpha2
b)L1L2=alpha1alpha2
c)L1alpha1=L2alpha2
d)none of these

Answer 4

help

Answer 5

yes arvind ,do you know about the relation between length and temperature?

Answer 6

hm yes

Answer 7

pls giv the aanswer its been a long time

Answer 8

2.A bottle of water at 0 degree on surface of moon what happens?

Answer 9

3.If 22 gm of CO2 at 27 degree is mixed with 16gm of O2 at 37 degree
the temp of mixture is?

Answer 10

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.

Answer 11

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

Answer 12

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

Answer 13

what abt 2nd qn?

Answer 14

wait..

Answer 15

kk cntinu

Answer 16

where you got this question 2?

Answer 17

in one of my worksheets

Answer 18

ok.. i am thinking about it..do you know ,what is the average temperature on the surface of the moon

Answer 19

nop

Answer 20

220 kelvin

Answer 21

arvind, any confusion..

Answer 22

second question is very interesting question.

Answer 23

did you get answer of first question.

Answer 24

answer Q1 is (c)

Answer 25

hey!

Answer 26

u der?

Answer 27

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)

Answer 28

yes arvind

Answer 29

any query arvind..

Answer 30

k in 2nd qn i have options
a)water freezes
b)water boils
c)water decomposes into h2 and o2
d)none of these

Answer 31

water freezes..(a)

Answer 32

is it bcoz temp less than 0 degree

Answer 33

yes ,the average Temperature of earth is 14deg C but on the moon surface it is 220 k=-53 degC.

Answer 34

what's the option of 3rd question in your worksheet

Answer 35

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....

Answer 36

yes....

Answer 37

ok.. i am going....

Answer 38

tell me the time

Answer 39

i will back 2 o'clock..