Calculate the amount of heat energy, in kJ, needed to increase the temperature of 200g of water by 300 C.

Q = 246 kJ

Explanation:

It is given that,

Mass of water, m = 200 g

Let initial temperature,

Final temperature of water,

We know that the specific heat capacity of water,

So, the heat energy needed to raise the temperature is given by :

or

Q = 246 kJ

So, the heat energy of 246 kJ is needed.

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explanation:

number of molecules / avogadro's number * molecule molecular = mass

explanation:

we define a gram-molecular weight as the mass of one mole of any element or compound. a mole contains avogadro's number of units (molecules) –  

6.022

x

10

23

. so, dividing the number of molecules by avogadro's number gives us the number of moles. multiplying that by the molecular weight gives us the mass. from the periodic table we find the gram-molecular weight of u to be238 and of f to be19. so,  

u

f

6

will have a gram-molecular weight of 352g.