Arigid tank contains 1 kg of carbon dioxide at 227 °c. the tank is cooled to the surrounding temperature of 27 °c. find the (a) carbon dioxide’s entropy change (kj/k) , (b) surrounding entropy change (kj/k), and (c) overall entropy change (kj/k) of the system and surroundings. assume variable specific !

Ahot wire operates at a temperature of 200°c while the air temperature is 20°c. the hot wire element is a tungsten wire of 5 um diameter and 2 mm in length. plot using excel current, heat transfer and heat generated by the wire for air velocity varying from 1-10 m/s in steps of lm/s? matlab the sensor voltage output, resistance, or assume nu 0.989 re033pr13 take air properties at tr (200°c20°c)/2 = 110°c properties of tungsten: c 0.13 kj/kg.k 3 p 19250 kg/m k (thermal conductivity) = 174 w/m.k