Mechanical Engineering - Heat Transfer, Refrigeration and Air Conditioning - Discussion

35. 

Thermal conductivity of water __________ with rise in temperature.

[A]. remains same
[B]. decreases
[C]. increases
[D]. may increase or decrease depending upon temperature

Answer: Option D

Explanation:

No answer description available for this question.

Manish said: (Nov 14, 2013)  
As we know thermal conductivity of liquid decreases with increase in temperature so option B is correct.

Awinash Kumar said: (Apr 20, 2014)  
Water is exception about the theory that k of liquid decreases with rise in temperature?

Bharat said: (Jun 20, 2014)  
You are right @Avinash because due to hydrogen bonding it increases up to 113 C and then decreases with rise in temp.

Pali Rosha said: (Jun 22, 2014)  
In Liquids thermal conductivity decreases with increase in temperature (except water) due to decreases in density with increase in temperature.

Keval Patel said: (Sep 19, 2014)  
Aluminium is also this kind of metal in which temperature increase then conductivity decrease.

Deepak Choudhary said: (Dec 20, 2014)  
Fusion curve of water has negative slope so that water is expands on freezing like that.

Bharat said: (Mar 8, 2015)  
There is an exception to water. There is a temperature called anomalous temperature 4*c at which water behaves differently before it and after it.

Adarsh said: (Jul 22, 2015)  
For most liquids the thermal conductivity falls with increasing temperature but this occurs only above about 130°C in liquid water.

Priyanka said: (Apr 2, 2016)  
For liquids and solids, the thermal conductivity decreases with increase in temperature. But water is an exception, in the case of water the thermal conductivity increases with increase in temperature.

Hitesh Daka said: (Jul 21, 2016)  
Here, the thermal conductivity of water increases with increase in temperature.

Abhishek said: (Aug 20, 2016)  
Because after 100f it behaves as gas and increase in temperature then the thermal conductivity increases so the answer is D.

Hitesh Daka said: (Aug 27, 2016)  
Thermal conductivity of liquids and solids decreased as temperature increased.

But in case:.

1) Water's thermal conductivity increased as temperature increased.

2) Al and uranium's thermal conductivity increased as temperature increased.

Shivram said: (Dec 30, 2016)  
Friends, please note that density of water is max at 4-degree centigrade.

Neeraj said: (Feb 22, 2017)  
D is right answer refer for the graph.

Mr. Sunil Sarangamath said: (May 7, 2017)  
According to me, the answer is C (increases the thermal conductivity).

Sunil Prajapati said: (Dec 12, 2017)  
D is the right answer. I agree.

Govind said: (Feb 11, 2018)  
Decreases is correct.

Here already mention the rise in temp so thermal conductivity of liquid decrease with increase in temp.

Akr said: (Jun 1, 2018)  
Same happens when we heat water, as the temperature increases the water expands making atoms move more freely enabling to transfer heat at increased speed (the resistance between atom decreaed) so the thermal conductivity increase with increase temprature.

Bhavik said: (Mar 18, 2020)  
Same happens when we heat water, as the temperature increases the water expands making atoms move more freely enabling to transfer heat at increased speed (the resistance between atom decreased) so the thermal conductivity increase with increase temperature.

Rohan said: (Jun 23, 2020)  
In general, the thermal conductivity of gases increases with temperature. Kinetic theory of gases explains why. Thermal conductivity of liquids decreases with increasing temperature as the liquid expands and the molecules move apart.

Mayur said: (Jul 7, 2020)  
Thermal conductivity increase with increase in temperature only for water.

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