How much energy will be released by cooling 1 kg of water upto temperature of `10^(@)`C ?

An electric kettle takes 4 A current at 220 V . How much time will it take to boil 1 kg of wate from temperature 20^(@)C ? The temperature of boiling water is 100^(@)C

An electric kettle takes 4 A current at 220 V. How much time will it take to boil 1 kg of water from temperature 20^@ C ? The temperature of boiling water is 100^@ C.

Answer these (a) How much energy is transferred when 1 g. of boiling water at 100^@ C condenses to water at 100^@ C ? (b) How much energy is transferred when 1 g. of boiling water 100^@C cools to water at 0^@ C? (c) How much energy is released or absorbed when 1 g. of water at 0^@ C freezes to ice at 0^@ C ? (d) How much energy released or absorbed when 1 g. of steam at 100^@ C cools to ice at 0^@ C?

How much energy producedin burning of 1 kg coal ?

(a) How much heat should be provided to ice of 720 g mass, lying at - 10^@C to melt it to water at 0^@C ? (b) How much heat should be provided to water at 0^@C to increase its temperature to 100^@C ?(c) How much heat should be given to water at 100^@C to transform it completely into water ? (d) Totally, how much heat should be given to ice of 720 g at -10^@C to convert it completely into vapour ? (C"ice"=2220 "J kg"^(-1) K^(-1), C"water"=4190 "J kg"^(-1) K^(-1) , LF=333 "kJ"/"kg", LV=2256 "kJ"/"kg" )

How much time heater will take to increase the temperature of 100g water by 50^(@)C if resistance of heating coat is 484Omega and supply voltage is 220V a.c.

The fission properties of ""_(94)^(239)Pu are very similar to those of ""_(92)^(235) U . The average energy released per fission is 180 MeV. How much energy, in MeV, is released if all the atoms in 1 kg of pure ""_(94)^(239)Pu undergo fission?

How much energy will be emitted from a furnace at 3000K temperature active as a perfect black body per unit area in 1 hour ? (sigma=5.7xx10^(-8)" Wm"^(-2)K^(-4))

How much positive and negative charge is there in a cup of water