Answer to Question #346074 in Molecular Physics | Thermodynamics for rox

Question

A contractor uses a paddle stirrer to mix a can of paint. The paddle turns at 29.2 rad/s and exerts a torque of 17.1 N·m on the paint, doing work on the paint at a rate of Power = τω = 17.1 N·m × 29.2 rad/s = 499.3 W. An internal energy increase of 12.1 kJ causes the temperature of the paint to increase by 1.00 K.

 

If there were no heat flow between the paint and the surroundings, what would be the temperature change of the paint as it is stirred for 5.00 min?

Answer 1

$∆T=\frac{Wt}Q=12.4~K.$