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Q1 .2 MOLES OF AN IDEAL GAS AT 2 BAR AND 27 DEGREE C EXPAND ISOTHERMALLY AGAINST A CONSTANT PRESSURE OF 1 BAR.THE WORK DONE BY GAS IS?

2. HOW MUCH HEAT IS REQUIRED TO CHANGE 10g ICE AT 0 DEGREE C TO STEAM AT 100 DEGREE C?LATENT HEAT OF FUSION AND VAPOUR FOR H2O ARE 80CAL/G AND 540 CAL/G RESP.SPECIFIC HEAT OF WATER IS 1 CAL/G?

SAYANTAN SINHA , 14 Years ago
Grade Upto college level
anser 2 Answers
Sunil Kumar FP
In thermodynamics, theworkinvolved when a gas changes from stateAto stateBis simply

=-2.303nRT Log P1/P2
= -2.303*.2*8.314*log2/1
=-1.15 J

2
amount of heat required is
mL1 +mCdT +mL2
=10(80 +540 +100*1)
=7200 cal
Last Activity: 11 Years ago
Arnav Chauhan
2.5kj
Is the answer as given in my package u have to use the formula
W=Pext ×(V2- V1)
then use Pv=nRT to find 
V
And neglect V1  the remaining is your answer
 
Last Activity: 7 Years ago
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