An electric heater takes 15 min to raise a certain quantity of water from 0°C to its boiling point.If it takes another 80 min to turn all water into steam ,find the latent heat of vaporsation of water.

A geyser heats water flowing at the rate of 3.0 litres per minute from 27^@ C to 77 ^@C . If the geyser operates on a gas burner. What is the rate of consumption of the fuel if its heat of combustion is 4.0×10 4 J/g?

When 0.15 kg of ice at 0^@C mixed with 0.30 kg of water at 50^@C in a container, the resutling temperature is 6.7^@C . Calculate the latent heat of fusion of ice. Given S_(water) = 4186J kg^-1 K^-1 .

A 1 molal aquous solution of trichloroacetic acid (C Cl_3COOH) is heated to its boiling point. The solution has the boiling point of 100.18^@C . Determine the Van't Hoff factor for the acid ( k_b for water = 0.512)

A brass boiler has a base area of 0.15 m2 and thickness 1.0 cm. It boils water at the rate of 6.0 kg/min when placed on a gas stove. Estimate the temperature of the part of the flame in contact with the boiler. Thermal conductivity of brass = 109 J s ^-1m^- 1K^-1 , Heat of vaporisation of water = 2256 xx 10^3 J kg^-1 .

When 0.2 kg of ice at 0°C is mixed with 0.40 kg water at 50°C,the resulting temperature is 7°C,Find latent heat of fusion of ice,(Give s-w=4186 Jkg^-1 K^-1)

Calculate the minimum amount of water at 15°C needed to cool 200g of mercury at 80°C to a temperature of 24°C (specific heat of mercury=0.033).

Work Problem related to the form A/(ax+by)+B/(cx+dy)=k A motorboat takes 6 hours to cover 100 km downstream and 30 km back. If the motorboat goes 75 km downstream and returns back to its starting point in 8 hours, find the speed of the motorboat in still water and speed of the stream.

0.52g of glucose (C_6H_12O_6) is dissolved in 80.2g of water calculate the boiling point of the solution. ( K_b for water is 0.52 K kg mol^-1 ).

1.8g of glucose (C_6H_12O_6) is dissolved in 100g of water in a beaker. At what temperature will water in the solution boil at 1.013 bar? Given boiling point of pure water at 1.013 bar is 373.15K and K_b for water is 0.052K mol^(-1) .

75 g of water at 100^@ C is added to 20 g of ice at -15^@C . Calculate the resulting temperature, give that latent heat of ice= 80 cal g^(-1)C^(-1) and specific heat of ice=0.5 cal g^(-1) C^(-1) .