Chemical Engineering - Heat Transfer - Discussion
Discussion Forum : Heat Transfer - Section 5 (Q.No. 12)
12.
A body cools down from 75°C to 70°C in 10 minutes. It will cool down from 70° C to 65° C in __________ minutes.
Discussion:
5 comments Page 1 of 1.
Sarang said:
1 decade ago
Conductivity of material increases with increase in temperature. Hence body at 75 take take only 10 min to reach at 65 but body at 65 take more than 10 min to reach upto 60.
JONY said:
8 years ago
In case of solid conductivity decrease with increase in temperature.
And in case of gas conductivity increase with an increase in temperature.
And in case of gas conductivity increase with an increase in temperature.
Raghvendra Tripathi said:
5 years ago
According to Newton's law of cooling, more the temperature difference quick heat transfer takes place.
Teja said:
3 years ago
@Sarang.
The conductivity of material increases or decreases based on the type of material.
The conductivity of material increases or decreases based on the type of material.
Teja said:
3 years ago
@jony.
Solid conductivity decrease with an increase in temperature is a wrong statement.
Based on the type.
1. For metals conductivity decreases with an increase in temperature.
3. For non-metals conductivity increases with an increase in temperature.
Solid conductivity decrease with an increase in temperature is a wrong statement.
Based on the type.
1. For metals conductivity decreases with an increase in temperature.
3. For non-metals conductivity increases with an increase in temperature.
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