How many kilojoules are required to melt 15g of ice at 0c and raise the temperature of the liquid that forms to 85c?

Answer : The heat required is, 10.3178 KJ

Solution :

The conversions involved in this process are :

Now we have to calculate the enthalpy change.

where,

= enthalpy change or heat required = ?

m = mass of water = 15 g

= specific heat of liquid water =

n = number of moles of water =

= enthalpy change for fusion = 6.01 KJ/mole = 6010 J/mole

Now put all the given values in the above expression, we get:

    (1 KJ = 1000 J)

Therefore, the enthalpy change is, 10.3178 KJ

c. because step up transformer steps up the input voltage i.e increases the input voltage  

the number of turns are greater on the secondary side of step up transformer  

transformer does not handle dc current

c (diamond),

sio2 (quartz)