Water of volume 2 litre in a container is heated with a coil of `1kW at 27^@C.` The lid of the container is open and energy dissipates at rate of `160J//s.` In how much time temperature will rise from `27^@C to 77^@C` [Given specific heat of water is
`4.2kJ//kg`]

Water of volume 2 L in a container is heated with a coil of 1 kW at 27^(@)C . The lid of the container is open and energy dissipates at rate of "160 J . S"^(-1) . In how much time (in minutes) temperature will rise from 27^(@)C to 75^(@)C ? ["Given specific heat of water is 4.2 kJ . kg"^(-1)]

Water of volume 2L in a closed container is heated with a coil of 1 kW. While water is heated, the container loses energy at a rate of 160 J/s. In how much time will the temperature of water rise from 27^(@)C" to "77^(@)C ? (Specific heat of water is 4.2 kJ / kg and that of the container is negligible).

Water of volume 4L in a closed container is heated with a coil of 2 kW. While water is heated, the container loses energy at a rate of 120 J/s. In how much time will the temperature of water rise from 27^(@)C to 77^(@)C ? (Specific heat of water is 4.2 kJ/kg and that of the container is negligible).