Calculate the amount of energy in kilojoules needed to change 225 g of water ice at −10 ∘c to steam at 125 ∘c. the following constants may be useful: cm (ice)=36.57 j/(mol⋅∘c) cm (water)=75.40 j/(mol⋅∘c) cm (steam)=36.04 j/(mol⋅∘c) δhfus=+6.01 kj/mol δhvap=+40.67 kj/mol express your answer with the appropriate units.

Consider a large isothermal enclosure that is maintained at a uniform temperature of 2000 k. calculate the emissive power of the radiation that emerges from a small aperture on the enclosure surface. what is the wavelength ? , below which 10% of the emission is concentrated? what is the wavelength ? 2 above which 10% of the emission is concentrated? determine the wavelength at which maximum spectral emissive power occurs. what is the irradiation incident on a small object placed inside the enclosure?

The higher the astm grain size number, the finer the gran is. a)-true b)-false

Air flows over a heated plate àt a velocity of 50m/s. the local skin factor coefficient at a point on a plate is 0.004. estimate the local heat transfer coefficient at this point.the following property data for air are given: density = 0.88kg/m3 , viscosity 2.286 x 10 ^-5 kgm/s , k = 0.035w/mk ,cp = 1.001kj/kgk. use colburn reynolds analogy.