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

answer: the correct answer id option(d).

explanation:

snell's law refraction:

the angle of refraction =

the angle of incidence =

refractive index of air = = 1

refractive index of glycerol = 1.47

from the given options, the most closest answer to 63.72° is 65° of option (d).

correct it is c.) b b