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Biology; Chemistry; Physics: Post your doubts here!

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how much energy will be required to convert 1kg at 1odegreeC into steam???
c (ice) = 21ooJ/kgK
c (water)= 42ooJ/kgK
lf = 3.36*10power5 J/kg
lv= 2.26*10power6 J/kg

amount of energy requird to increase temp to 100degrees = 90 x 4200 x 1 = 378000j
amount of energy to convet it to gas = 2.26 x 10^6 x 1 = 2.26 x 106
Total energy = 2638000j
 
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i did from 2005 till 2011! that is enough past papers no matter what subject u r doing!
 
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Its a gud thing that instead of studying ur trying to solve other ppl's problems? :eek:
For Instance you helped someone with something! That thing came in the exam, the person thanked Allah for knowing it. After the exam he would think if you hadn't been there he would have lost the mark and thus he would pray for your succes! And BOOM you get an A*
 
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For Instance you helped someone with something! That thing came in the exam, the person thanked Allah for knowing it. After the exam he would think if you hadn't been there he would have lost the mark and thus he would pray for your succes! And BOOM you get and A*
Well thats a good point :D
 
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Yeah its nice to help other ! Practice bhi ho jati hai ! And then u feel encouraged dat u knw wht others dnt know amd dat u have studied it :D
exactly why i am so active on XPF! it is really really important for confidence and remembering small points! though if ur prep is not done, i usually disconnect my internet! :p:D can stop using XPF!
 
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