An aluminium kettle weighs 1.05 kg.
(a) what is the heat capacity of the kettle?
(b) how much heat is required to increase the temperature of this kettle from 23.0 to 99.0 degree celcius?
(c) how much heat is required to het this kettle from 23.0 to 99.0 degree celcius if it contains 1.25l of water (densityof 0.997 g/ml and a specific heat of 4.184 j/g degree celcius)

Explained

Explanation:

Given

mass of aluminium kettle()=1.05 kg

(a)Heat capacity of the kettle=Heat capacity of Aluminium

(b)Heat is required to increase the temperature of this kettle from

Q=71.82 kJ

(c)If kettle contains water 1.25 L of water i.e. 1.246 kg of water then heat required to raise the temperature from 23 to 99

Q=71.82+396.20=468.028 kJ

the best answer is d because the strong cohesion is caused by the ability of water molecules to undergo hydrogen bonding.

a is incorrect because when water solidifies, it becomes   ice, which expands and occupies a bigger volume for the same mass of water in its liquid state.

b is incorrect because water has high surface tension. besides bonding to itself it hydrogen bonds to other molecules at the top decreasing possibility for breaking of attractive forces.

c is incorrect because the water molecule has oxygen which is highly electronegative and so pulls the electron pair towards itself creating a dipole moment, making the molecule polar.

e is incorrect because water has strong adhesion, ability to stick to other molecules such as glass because of this molecules having stronger hydrogen bonding than water.

the answer is:  

line graphs show patterns in data with variables that change over time; whereas, circle graphs show data as parts out of a whole (such as out of 100%).