Ask a Doubt
Request a call back

Join NOW to get access to exclusive study material for best results

JEE Class main Answered

A swimmer coming out from a pool with a film of water weighing about 18 g .how much heat must be supplied to evapourite this water?also calculaye internal energy of vapiurisation at 100℃ given Enthalpy of vapiurisation at 373k is 40.66kj/mole
Asked by ashutosharnold1998 | 11 Aug, 2019, 12:37: AM
answered-by-expert Expert Answer
Given:
 
Mass of water = 18 gm
 
ΔvapH2O = 40.66 kJ/mol
 
R = 8.314×10−3 kJ/mol
 
T = 373 K
 
Evaporation of water is given as,
 
straight H subscript 2 straight O subscript open parentheses straight l close parentheses end subscript space space space rightwards arrow with Vaporisation on top space space straight H subscript 2 straight O subscript open parentheses straight g space close parentheses space end subscript space space space increment subscript space vap end subscript straight H space equals space 40.66 space kJ divided by mol 18 space gm space space space space space space space space space space space space space space space space space space space space space space space space 18 space gm space 1 space mol space space space space space space space space space space space space space space space space space space space space space space space space space space space space 1 space mol
 
ΔvapU = ΔH − PΔV
 
         =ΔH −ΔngRT
 
Δng = 1−0 
      = 1 mol
 
Therefore
 
ΔvapU = 40.66 − (1)(8.314×10−3)(373)
 
          = 40.66 − 3.10
 
ΔvapU = 37.55 kJ/mol
 
Internal energy of vaporisation is 37.55 kJ/mol
Answered by Varsha | 12 Aug, 2019, 11:19: AM

Application Videos

Concept Videos

Multiple Choice Questions Practice Test
Answered Unanswered My Questions My Answers
JEE main - Chemistry
answer
question image
Asked by azmi13165 | 25 Feb, 2024, 11:27: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
JEE main - Chemistry
the work done in joules when a gas compressed by an average pressure of 0.50 atm so as to decrease it's volume from 400 cm³ to 200 cm³
question image
Asked by mp0985797 | 01 Feb, 2022, 08:38: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
JEE main - Chemistry
fusion of ice is an example of which process
Asked by sgawade2310 | 26 Jun, 2021, 02:58: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
JEE main - Chemistry
Find internal energy
question image
Asked by ashutosharnold1998 | 03 Nov, 2019, 08:22: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
JEE main - Chemistry
Find internal energy ?
Asked by ashutosharnold1998 | 31 Oct, 2019, 07:16: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
JEE main - Chemistry
A swimmer coming out from a pool with a film of water weighing about 18 g .how much heat must be supplied to evapourite this water?also calculaye internal energy of vapiurisation at 100℃ given Enthalpy of vapiurisation at 373k is 40.66kj/mole
Asked by ashutosharnold1998 | 11 Aug, 2019, 12:37: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
JEE main - Chemistry
Find work in expansion?
question image
Asked by ashutosharnold1998 | 10 Aug, 2019, 12:10: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
JEE main - Chemistry
  The standard change in Gibbs energy for the reaction,  at 25°C is: a)  100 kJ b)  -90 kJ c)  90 kJ d)  -100 kJ
Asked by Ranjeetgupta26068 | 19 May, 2019, 10:14: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
JEE main - Chemistry
Plz tell me this in detailed the strategy being applied here 
question image
Asked by shrutigandha07 | 15 Apr, 2019, 08:40: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
JEE main - Chemistry
Plz solve it step by step 8
question image
Asked by vishakhachandan026 | 15 Apr, 2019, 11:34: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
My Class Videos Tests ₹ Plans Ask a Doubt
Get Latest Study Material for Academic year 24-25 Click here
×