All Questions
14 questions
-3
votes
1
answer
284
views
If Qc> Kc how can forward reaction can take place
If Qc>Kc then there will be a net backward reaction but still forward reaction will take place. My problem is if Qc>Kc forward reaction will become non spontaneous right. So how can that happen, ...
- 13
2
votes
1
answer
320
views
How does heat transfer between molecules happen in deep?
Inside the container is cold water and outside the container is hot water. B is the microscopic view of container walls .W is water
And A is hot water.
What I have shown is the microscopic view of ...
- 412
3
votes
2
answers
6k
views
Does adding ice to sparkling mineral water extend the 'fizziness' of the solution before the drink goes flat?
To my understanding the carbonated beverage loses its $\ce{CO2}$ content as gas bubbles which gives the drink its 'fizziness'. The loss of $\ce{CO2}$ occurs due to the low solubility of carbonic acid ...
- 815
-2
votes
1
answer
4k
views
VT graph thermodynamics
If we have one mole monoatomic ideal gas was taken through process AB as shown in the figure then ∆ S is positive and work is also positive but how can we find the value of work and heat absorbed as ...
- 409
1
vote
2
answers
6k
views
Is melting of Tar for road construction a reversible change?
In India roads are made up of a black liquid which is prepared by melting a black material(probably coal tar). After cooling the liquid becomes very rigid. Can this solid be converted back to its ...
- 712
2
votes
3
answers
14k
views
How much does a light heat the air around it?
My dad told me to turn off the lights when I'm not using them because it will keep the house cooler. I don't think he is correct that a light can heat up the room. How much of a difference in the ...
- 1,167
1
vote
0
answers
43
views
Thermodynamic-Fuel and efficiency
Why is the maximum theoretical efficiency of Ar engine higher than that of Nitrogen engine? On a molecular level.
For an Otto Cycle
$\mathrm{Eff} \le\left(1-r^{1-\gamma}\right)$
$\gamma=\dfrac{C_p}{...
- 51
1
vote
1
answer
4k
views
When the heat is absorbed by the ice then ice will melt to form liquid water
My new try:
Given data
Energy given by reaction =1690 kJ
Initial temperature = 0 oC
Final temperature = 50 oC
C water = 4.18 Jmol-1 K-1
?Hfus ice = 6.01 kJ*mol-1
Calculate Mass of ice = ?
Ice ...
- 75
8
votes
1
answer
1k
views
What Causes there to be a Maximum Amount of Salt which can be Dissolved in Water?
When you add salt to water and stir, after a while the salt will no longer dissolve. Why is this?
- 373
0
votes
1
answer
3k
views
endothermic dissolution process
Can anybody give me an example of an endothermic dissolution process, preferably one in which name of the substances involved are easy to remember. I have searched the Web thoroughly but could not ...
- 83
0
votes
1
answer
1k
views
Is it possible to make liquid nitrogen with a bottle of CO2 gas and a freezer?
I really want to make liquid nitrogen(or oxygen) without using dry ice, a specially made freezer, or other chemicals.
I have a mixture of some sponges, rotten grass, sugar and water, which makes ...
- 111
-4
votes
1
answer
3k
views
Strange observation!
Every one have observed that when we pour cool water into a transparent glass (or simply glass), some droplets accumulate on the outside part. Did the droplets come pass through the glass? If they ...
- 2,374
2
votes
1
answer
4k
views
Why doesn't diffusion take place between immiscible liquids?
If we take a test-tube of bromine and invert an upside-down test tube of air on top of it, it'll diffuse with the air, until the bromine is thoroughly 'mixed' with the air in both test tubes. But why ...
- 3,499
11
votes
4
answers
100k
views
Why calcium chloride is used to melt ice over sodium chloride
I'm not quite sure I understand this. My question is:
Calcium chloride is a salt used widely to melt ice on sidewalks and roads. Explain why one mole of $\ce{CaCl2}$ would be more effective than ...
- 233