How many grams of ice at -19.9 ∘c can be completely converted to liquid at 18.7 ∘c if the available heat for this process is 4.50×103 kj ? for ice, use a specific heat of 2.01 j/(g⋅∘c) and δhfus=6.01kj/mol . express your answer to three significant figures and include the appropriate units.

Answer : The mass of ice is

Solution :

The process involved in this problem are :

The expression used will be:

where,

= heat available for the reaction =

m = mass of ice = ?

= specific heat of solid water or ice =

= specific heat of liquid water =

= enthalpy change for fusion =

Molar mass of water = 18 g/mole

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

Therefore, the mass of ice is

a.metals can become magnetic if they have many spinning electrons that create magnetic fields.d.only some metals are attracted by magnets; these metals are called ferromagnetic.

d.wrapping an insulated wire around a metal with ferromagnetic properties and applying an electric current.

measuring things 1 litre of water