How much heat is required to change 150.0 g of water from 21.0 °C to 45.0°C

When it asks how much heat it is required to change the temperature then it is called specific heat capacity, and when it says how much heat required TO CHANGE THE STATE then it is latent heat so here we will do by formula of

           Q = mcT

where q is heat

          m is mass

           T is change in temperature which is going to be 24 here

put all the values you will get the answer

HOPE IT HELPS!

chemical energy is stored in the chemical bonds of atoms and molecules. it can only be seen when it is released in a chemical reaction. when chemical energy is released, the substance from which the energy came is often changed into an entirely different substance.

this chemical reaction releases energy in the form of light and heat. chemical energy is the potential energy stored in the arrangement of atoms within molecules. breaking chemical bonds requires energy, while forming new chemical bonds releases energy.

the atp molecule can store energy in the form of a high energy phosphate bond joining the terminal phosphate group to the rest of the molecule. in this form,energy can be stored at one location, then moved from one part of the cell to another, where it can be released to drive other biochemical reactions.

a saline water is fed to a reverse osmosis unit at flow rate o rotameter connected to reject (retentate) line reads 8 installed in reject and permeate line reads 15.2 milli siemens/cm and 300 micro siemens/com respectively.