Temperature combination, Homework (HELP)

In summary, the problem involves combining 4 ice cubes at 0 degrees C with a total mass of 53.5g and 115g of water at 75 degrees C in an insulated container. The final temperature of the mixture will be determined by the conservation of energy, where the heat energy transferred to the ice blocks will be equal to the heat energy lost by the water. The equation used is q = m x Cs x ^T, where Cs ice = 2.09 J/gC and ^H fus = 6.02 KJ/mol. The concept of finding the energy to melt the ice (phase change) and raise the temperature to 75 degrees is also mentioned. However, the final temperature may not necessarily
  • #1

Homework Statement


Four ice cubes at exactly O degrees C having a total mass of 53.5g are combined with 115 g of water at 75 degrees C in an insulated container. If no heat is lost to the surroundings, what will be the final temperature of the mixture?

Homework Equations


q=m x Cs x ^T
q= n x ^H fus

Cs ice= 2.09 J/gC
for H20 ^H fus= 6.02 KJ/mol
18.02 g=1 mol for H20
 
Last edited by a moderator:
Physics news on Phys.org
  • #2
Use the idea of conservation of energy. The heat energy transferred to the ice blocks will be equal to the heat energy lost by the water.
 
  • #3
What about the Heat of fusion for the ice melting?
I figured it had something to do with finding the energy to melt the ice (the phase change part) plus the energy as the ice goes up to 75 degrees, and then set the combination equal to the mass of the solution x the specific heat of water x the final temp (unknown) - initial temp 75.
I know that's wrong because the ice doesn't necessarily go to 75 degrees, in fact the temp should be lower. Any suggestions?
Thanks!
 
  • #4
Try to write equations describing energy balance as danago proposed. Some of your concepts are OK, once you will write it all as an equation it should be obvious.
 

1. What is temperature combination?

Temperature combination refers to the mixing or blending of two or more substances or materials at different temperatures to reach a desired final temperature.

2. Why is temperature combination important in science?

Temperature combination is important in science because it allows for precise control and manipulation of temperature to achieve specific reactions or results. It is also essential in various scientific experiments and processes.

3. How does temperature combination affect chemical reactions?

Temperature combination can significantly affect chemical reactions. Increasing the temperature of a reaction can speed up the rate of the reaction, while decreasing the temperature can slow it down. It can also affect the stability and yield of a reaction.

4. What are some techniques for achieving temperature combination?

Some techniques for achieving temperature combination include using a hot plate, water bath, or heat block to heat and mix substances, as well as using a refrigerator or ice bath to cool and mix substances.

5. How can I calculate the final temperature of a temperature combination?

The final temperature of a temperature combination can be calculated using the formula: Tf = (m1 x T1 + m2 x T2) / (m1 + m2), where Tf is the final temperature, m1 and m2 are the masses of the substances, and T1 and T2 are their respective initial temperatures.

Suggested for: Temperature combination, Homework (HELP)

Replies
2
Views
1K
Replies
3
Views
2K
Replies
3
Views
757
Replies
1
Views
1K
Replies
4
Views
1K
Replies
4
Views
1K
Replies
4
Views
2K
Back
Top