The entropy change during heating of 50 g water (sp. Heat `=4200 J kg^(-1) K^(-1)`) from `20^(@)C` to `40^(@)C` will be

The amount of heat required to raise the temperature of 100g of copper (sp.heat= 390J//kg^(@)C ) from 40^(@)C to 90^(@)C is 1950J //1950000J.

Calculate the entropy change when 1 kg of water is heated from 27^(@)C to 200^(@)C forming supper heated steam under constant pressure. Given specific heat of water = 4180 J Kg^(-1)K^(-1) and specific heat of steam = 1670 + 0.49 J kg^(-1)K^(-1) and latent heat of vaporisation =23 xx 10^(5) J kg^(-1) .

A sample of 10g H_(2)O is slowly heated from 27^(@)C to 87^(@)C . Calculate the change in entropy during heating. (specific heat of water =4200 J kg^(-1)K^(-1)) .

A sample of 10g H_(2)O is slowely heated from 27^(@)C to 87^(@)C . Calculate the change in entropy during heating. (specific heat of water =4200 J kg^(-1)K^(-1)) .

An electric kettle of 1200W has 1 kg water at 20^@C . The water equivalent of the kettle is 500g . The time required to heat water from 20^(@) to 100^(@)C will be (specific heat of water = 4200 J//kg^(@)C) .

Find the heat energy required to boil 5 kg of water iff its initial temperature is 30^(@)C (specific heat of water is 4200 J kg^(-1)" "k^(-1) and boiling point is 100^(@)C )