Answer:
W = -25 J
Explanation:
For a cyclic process, the variation of internal energy (ΔU) must be 0. It means that ΔU from step 1 must be equal to ΔU from step 2. For the first law of the thermodynamics, the energy must be conserved, so:
ΔU = Q - W, from each step. Q is the heat and W the work
When the heat is gained by the system, the process is endothermic, so Q >0, when the system loses heat, the process is exothermic, and Q<0. When the system is expanding W>0, and when it is compressing, W<0.
From step 1:
ΔU = 42 - 14
ΔU = 28 J
From step 2:
28 = -53 - W
W = -53 + 28
W = -25 J
The rock has a mineral composition between granitic and basaltic rock. The rocks that contain a lot of silica but less iron and magnesium is granitic. However, Basaltic rocks have loads of iron and magnesium but very little silica. So therefore, your answer is an Andesic rock. Hope this helped!
No of moles of Carbon, C = mass/ molar mass.
Molar mass of carbon = 12.0107. We only have to calculate the no of moles
of carbon to obtain carbon's mass. .
From Sucrose chemical formula C12H22O11 we know that there are 12
carbon atoms.
So there are 1.4x10^(20) x12 = 16.8 x 10^20 carbon atoms.
We will use avogardo's number to find out the number of carbon molecules
in the compound.
From Avogadro's no. One mole of any substance equals to 6.022140857
atoms.
So X mole contains 16.8 * 10^(20) carbon atom
(16.8x10^20 carbon atoms)/6.022 x10^23 particles/mol = 0.00279 mols
The molar mass of carbon is 12.0107g/mol so we'll multiply to get the mass:
0.00279 mols x 12 = 0.03348.
