Impossible tHERMODYNAMICS Problem

AI Thread Summary
The problem involves calculating the work done and the increase in internal energy when nine grams of water vaporizes at one atmosphere. The latent heat of vaporization is given as 2.26 × 10^6 J/kg. The volume change during the process is from 0.5 cm³ to 2165 cm³. Users are struggling with unit conversions and calculations, particularly in applying the formula for work, W = change in volume * pressure. Detailed calculations and unit handling are requested for clarity.
od943
Messages
5
Reaction score
0

Homework Statement


Given: latent heat of vaporization of water = 2.26 × 106 J/kg .
Nine gram of water changes from liquid to vapor at a pressure of one atmosphere. In the process, the volume changes from 0.5 cm3 to 2165 cm3.
Find the work done. Answer in units of J.

Find the increase in internal energy of the water.
Answer in units of J


Homework Equations



Latent Heat=2.26x10^6(kg)
this doesn't work

W=change in volume * pressure

The Attempt at a Solution


i have plugged in the values for the first section and they do not work. Changing to pascals/kg aren't right.
 
Physics news on Phys.org
Can you show your calculations in more detail, specifically the way you addressed the units?
 

Thread 'Struggling to understand the concept of this question (ice cube in water optics question)'

TL;DR Summary: I came across this question from a Sri Lankan A-level textbook. Question - An ice cube with a length of 10 cm is immersed in water at 0 °C. An observer observes the ice cube from the water, and it seems to be 7.75 cm long. If the refractive index of water is 4/3, find the height of the ice cube immersed in the water. I could not understand how the apparent height of the ice cube in the water depends on the height of the ice cube immersed in the water. Does anyone have an...
View full post »
Thread 'Variable mass system : water sprayed into a moving container'

Thread 'Variable mass system : water sprayed into a moving container'

Starting with the mass considerations #m(t)# is mass of water #M_{c}# mass of container and #M(t)# mass of total system $$M(t) = M_{C} + m(t)$$ $$\Rightarrow \frac{dM(t)}{dt} = \frac{dm(t)}{dt}$$ $$P_i = Mv + u \, dm$$ $$P_f = (M + dm)(v + dv)$$ $$\Delta P = M \, dv + (v - u) \, dm$$ $$F = \frac{dP}{dt} = M \frac{dv}{dt} + (v - u) \frac{dm}{dt}$$ $$F = u \frac{dm}{dt} = \rho A u^2$$ from conservation of momentum , the cannon recoils with the same force which it applies. $$\quad \frac{dm}{dt}...
View full post »

Similar threads

I try to solve a thermodynamics problem on heat transfer
Replies
3
Views
2K
Mixing water and ice
Replies
12
Views
917
Thermodynamics internal energy Problem
Replies
1
Views
2K
Clausius-Clapeyron equation and absorbed heat
Replies
3
Views
2K
Thermodynamics- conservation of heat and energy
Replies
13
Views
2K
Calculate change in entropy per minute.
Replies
4
Views
1K
Finding the Value of M in a Physics Homework Problem
Replies
12
Views
2K
What is the Entropy Change When Water Freezes to Ice?
Replies
4
Views
2K
How Much Heat Is Required to Vaporize Water in Homework Problem 2.9?
Replies
1
Views
2K
Thermodynamics - water vapour cycle
Replies
44
Views
5K

Hot Threads

Recent Insights

Back
Top