Two tanks A and B contain water at `30^@C` and `80^@C` respectively calculate the amount of water that must be taken from each tank respectively to prepare 40 kg of water at `50^@C`

A tap supplies water at 15^@C and another tap connected to geyser supplies water at 95^@C . How much hot water must be taken so as to get 60 kg of water at 35^@C ?

The pH of pure water at 25^(@)C and 35^(@)C are 7 and 6 , respectively. Calculate the heat of formation of water from H^(o+) and overset(Θ)OH .

Two taps A and B supply water at temperature 10^(@)C and 50^(@)C respectively . Tap A alone fills the tank in 1 hour and tap B alone fills the tank in 3 hour. If we open both the taps together in the empty tank , if the final temperature of the water in the completely filled tank is found to be 5alpha ("in" "^(@)C) . Find the value of alpha . Neglect loss of heat to surrounding and heat capacity of the tank.

If 1000kg of water is heated from 0^(@)C to 100^(@)C , calculate the increase in mass of water.

A tap supplies water at 10^@ C and another tap at 100^@ C . How much hot water must be taken so that we get 20 kg of water at 35^@ C