In a test of rocket propellant performance, liquid hydrazine (n2h4) at 100 kpa, 25 °c, and oxygen gas (o2) at 100 kpa, 25 °c, are fed to a combustion chamber in the ratio of 0.4 kg o2 to 1 kg n2h4. the heat transfer from the chamber to the surroundings is estimated to be 200 kj per kmol of n2h4. assume that only gaseous h2o, h2, and n2 are present in the products. the enthalpy of formation of liquid hydrazine is +50,417 kj/kmol.

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