Calorimeter Problem: Final Temp of Water & Ice Mixture

  • Thread starter Thread starter kill00
  • Start date Start date
  • Tags Tags
    Calorimeter
AI Thread Summary
A calorimeter problem involves a 200 g aluminum calorimeter containing 300 g of water at 75°C, into which 20 g of ice at 0°C is added. The heat lost by the water as it cools to 0°C is calculated to be 94,185 J, while the heat required to melt the ice is 6,700 J. After accounting for the heat exchange, the final temperature is estimated to be around 66.5°C. The calculations also incorporate the heat absorbed by the aluminum, leading to a refined final temperature of approximately 66.6°C. The problem emphasizes the importance of considering all components in thermal equilibrium calculations.
kill00
Messages
8
Reaction score
0

Homework Statement


A 200.0 g aluminum calorimeter holds 300g of water at 75 C. 20 g of ice at 0 C are added to the water. What is the final temperature of the mixture?


Homework Equations


Use Lf= 33.5 x 104
Cal= 900 J/kg C

The answer is 66.5 C

The Attempt at a Solution


Don't know where to start.
 
Physics news on Phys.org
Well, this is what i came to:

Find the heat lost by the water, if it is cooled to 0 C:
(.3)(4186)(75) = 94185

Calculate the heat needed to melt the ice:
(.02)(33.5e4) = 6700Q left:
( 94185 - 6700) = 87485

Final temp = 87485 / ( .32)(4186) = 65.3 C

The answer is 66.5 C. I don't know what to do with the aluminum
 
Woohoo I think I got it:

QAL = (.2)(900)(65.3-75) = 1746

Final temp = (1746 + 87485) / (.32*4186) = 66.6 C
 
Thread 'Voltmeter readings for this circuit with switches'
TL;DR Summary: I would like to know the voltmeter readings on the two resistors separately in the picture in the following cases , When one of the keys is closed When both of them are opened (Knowing that the battery has negligible internal resistance) My thoughts for the first case , one of them must be 12 volt while the other is 0 The second case we'll I think both voltmeter readings should be 12 volt since they are both parallel to the battery and they involve the key within what the...
Thread 'Struggling to make relation between elastic force and height'
Hello guys this is what I tried so far. I used the UTS to calculate the force it needs when the rope tears. My idea was to make a relationship/ function that would give me the force depending on height. Yeah i couldnt find a way to solve it. I also thought about how I could use hooks law (how it was given to me in my script) with the thought of instead of having two part of a rope id have one singular rope from the middle to the top where I could find the difference in height. But the...
Back
Top