Calculate the amount of heat required to change a 350 grams ice from -20 degrees Celsius to 35 degrees Celsius. Cp of ice = 2100 J/kg-ºC Heat of fusion of ice = 3.34 x 10^5 J/kg

5.52 A long rod 40 mm in diameter, fabricated from sapphire (aluminum oxide) and initially at a uniform temperature of 800 K, is suddenly cooled by a fluid at 300 K hav- ing a heat transfer coefficient of 1600 W/m² K. After 35 s, the rod is wrapped in insulation and experiences no heat losses. What will be the temperature of the rod after a long period of time?

16.1 The Fourier field equation in cylindrical coordinates is ᎧᎢ ²T 10T 12T = α Ət a + + - მr2 r ər r² 80² ²T Əz² a. What form does this equation reduce to for the case of steady-state, radial heat transfer? b. Given the boundary conditions T = T₁ at r = ri T = T。 at r = ro

The work done when a gas is expanded in a cylinder is -220 J. A heat transfer of 190 J occurs from the surrounding to the gas. Calculate ∆E of the gas in J.

Define C.O.P. of the simple vapor compression refrigeration cycle R-717. The evaporation temperature is -15 ° C and the condenser temperature is 30 ° C. COP =