Physics problem ^_^..help me..
By lonely_f16
@lonely_f16 (2146)
Philippines
March 1, 2008 5:10pm CST
How much energy is required to change a 45-g ice cube at -12 degree celsius into steam at 112 degree celsius?
the answer of this question is 136,000 J but then I don't know the solution or how to solve it. I just got the answer from the book but the book doesn't have any solution. Do you know the solution?? thanks...
2 people like this
2 responses
@kamran12 (5526)
• Pakistan
2 Mar 08
Hello lonely_f16,
If you have read physics, it shouldn't be difficult for you. I don't remember some specific values but here are the formulae to calculate. It will take 5 steps.
1. Heat for -12 degree ice to 0 degree ice = mass x specific heat of ice x temperature difference (i.e. 12)
2. Heat for 0 degree ice to 0 degree water = mass x latent specific heat of fusion of ice
3. Heat for 0 degree water to 100 degree water = mass x specific heat of water (liquid) x temperature difference (i.e. 100)
4. Heat for 100 degree water to 100 degree vapor = mass x latent specific heat for vaporization
5. Heat for 100 degree vapor to 112 degree vapor = mass x specific heat of water vapor
I don't remember the values, look them up, apply these formulae and you will get the result!
I hope it helps but if you are not able to find values, then I'll try to look them up on internet but then you can do the same!:-)
1 person likes this
@ralph12345abc (1311)
• India
2 Mar 08
these are the right steps i had calculated out the data it comes approximately 136650J.make sure to check the values of specific heat of ice,specific heat of steam,latent heat of fusion of ice to water & water to steam.
2 people like this
@ralph12345abc (1311)
• India
3 Mar 08
actually i had done that question my way, but when i checked your steps they were the same as mine so i just overlooked your mistake.
1 person likes this
