100 g of water is heated from 30^@C to 50^@C. Ignoring the slight expansion of the water, the change in its internal energy is : (specific heat of water is 4184 J kg^(-1) K^(-1) )

100 g of water is heated from 30^@C to 50^@C. Ignoring the slight expa

1.	100 g of water is heated from 30^@C to 50^@C. Ignoring the slight expansion of the water, the change in its internal energy is : (specific heat of water is 4184 J kg^(-1) K^(-1) )
Answer» 4.2 KJ 8.4 kJ 84 kJ 2.1kJ ANSWER :B