A sphere of radius 0.081029 m is made of aluminum. It is submerged in flowing water with a temperature of 25 °C that results in a heat transfer coefficient of 103.067 W/m2•K. Its surface temperature is 124.978 °C at 0 s. What will its surface temperature be at 767.276 s? (Answer in °C.)

its surface temperature = 54.84 ° C

Explanation:

The density of aluminium = 2700 kg/m ³

Heat capacity = 897 J/Kg.K

radius of the sphere (r) = 0.081029 m

= 25 °C

= 124.978  °C

time (t) = 767.276 s

Using the formula :

where.

Replacing our values ;we have:

T ≅ 54.84 ° C

Therefore, its surface temperature = 54.84 ° C

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