A pitcher with `1-mm` thick porous walls contain 10kg of water. ,Water comes to its outer surface and evaporates at the rate of `0.1gs^(-1)` . The surface area of the pitcher (one side) `=200cm^(2)` . The room temperature `=42^(@)C` , latent heat of vaporization `=2.27xx10^(6)Jkg^(-1)` , and the thermal conductivity of the porous walls `=0.80js^(-1)m^(-1)`^(@)C^(-1)` . Calculate the temperature of water in the pitcher when it attains a constant value.

An iron boiler is 1 cm thick and has a heating area 2.5 m^(2) . The two surface of the boiler are at 230^(@)C and 100^(@)C respectively. If the latent heat of the steam is 540 kcal kg^(-1) and thermal conductivity of iron is 1.6xx10^(-2)K cal s^(-1) m^(-1)K^(-1) , then how much water will be evaporated into steam per minute ?

An iron boiler is 1 cm thick and has a heating area 2.5 m^(2) . The two surface of the boiler are at 230^(@)C and 100^(@)C respectively. If the latent heat of the steam is 540 kcal kg^(-1) and thermal conductivity of iron is 1.6xx10^(-2)K cal s^(-1) m^(-1)K^(-1) , then how much water will be evaporated into steam per minute ?

Find the result of mixing 1kg of ice at 0^(@)C with 1.5kg of water at 45^(@)C . (Specific latent heat of fusioin of ice =336xx10^(3)Jkg^(-1) )

A thermally insulated vessel contains 150g of water at 0^(@)C . Then the air from the vessel is pumped out adiabatically. A fraction of water turms into ice and the rest evaporates at 0^(@)C itself. The mass of evaporated water will be closest to : (Latent heat of vaporization of water =2.10xx10^(6)jkg^(-1) and Latent heat of Fusion of water =3.36xx10^(5)jkg^(-1) )

A thermally insulated vessel contains 150g of water at 0^(@)C . Then the air from the vessel is pumped out adiabatically. A fraction of water turms into ice and the rest evaporates at 0^(@)C itself. The mass of evaporated water will be closest to : (Latent heat of vaporization of water =2.10xx10^(6)jkg^(-1) and Latent heat of Fusion of water =3.36xx10^(5)jkg^(-1) )

On a winter day when the atmospheric temperature drops to -10^(@)C , ice forms on the surface of a lajke. (a) Calculate the rate of increases of thickness of the ice when 10cm of ice is already formed. (b) Calculate the total time taken in forming 10cm of ice. Assume that the temperature of the entire water reaches 0^(@)C before the ice starts forming. Density of water =1000kgm^(-3) , latent heat of fusion of ice =3.36xx10^(5)Jkg^(-1) and thermal conductivity of ice =1.7Wm^(-1) ^(@)C^(-1) . Neglect the expension of water on freezing.

Steam at 100^(@)C is passed into a copper cylinder 10 mm thick and of 200 cm^(2) area. Water at 100^(@)C collects at the rate of 150 g min^(-1) . Find the temperature of the outer surface, if the conductivity of copper is 0.8 cal s^(-1) cm^(-1) .^(@)C^(-1) and the latent heat of steam is 540 cal g^(-1) .

An iron boiler is 10 mm thick and has a heating area 2m^(2) . The two surfaces of the boiler are at 240^(@)C and 100^(@)C respectively. Find the mass of the water evaporated into steam per minute. Given that latest heat of steam is 536 kcal kg^(-1) and thermal conductivity of iron is 1.6 xx 10^(-2) kcal s^(-1) m^(-1) .^(@)C^(-1) .

An iron boiler with walls 1.25 cm thick contains water at atmospheric pressure. The heated surface is 2.5 m^(2) in area and the temperature of the underside is 120^(@)C. Thermal conductivity of iron is 20 cal s^(-1) m^(-1) K^(-1) and the latent heat of evaporation of water 536 xx10^(3) cal kg^(-1) . Find the mass of water evaporated per hour.