<span>The two techniques for separating an insoluble solid from a liquid are filtration and centrifuging. Filtration relies on the fact that the solid particles are smaller than the filter paper pores which allow the tiny molecules of liquid to pass through. With solids which dissolve in a liquid solvent, evaporation is commonly used to recover the solid and distillation is used to recover the solvent.</span>
b) a starch should be your answer
Hi sorry
I don’t know
but maybe next time
Answer:
3 Fe₂O₃(s) + H₂(g) ⇒ 2 Fe₃O₄(s) + H₂O(g) ΔH° = -6.00 kJ
Explanation:
Let's consider the following balanced equation.
3 Fe₂O₃(s) + H₂(g) ⇒ 2 Fe₃O₄(s) + H₂O(g)
When 1 mole of Fe₂O₃(s) reacts, 2.00 kJ of energy are evolved. Energy is an extensive property. In the balanced equation there are 3 moles of Fe₂O₃(s), so the evolved energy is:
![3molFe_{2}O_{3}.\frac{2.00kJ}{1molFe_{2}O_{3}} =6.00kJ](https://tex.z-dn.net/?f=3molFe_%7B2%7DO_%7B3%7D.%5Cfrac%7B2.00kJ%7D%7B1molFe_%7B2%7DO_%7B3%7D%7D%20%3D6.00kJ)
By convention, when energy is evolved it takes the negative sign. At constant pressure, the thermochemical equation is:
3 Fe₂O₃(s) + H₂(g) ⇒ 2 Fe₃O₄(s) + H₂O(g) ΔH° = -6.00 kJ
where
ΔH° is the standard enthalpy of reaction (heat released at constant pressure)
Heat energy= mass x specific heat x change in temperature
change in temperature=47.0=10.0= 37 degrees
convert mass in G = 6.83x1000=6830g
Heat energy is hence= 6830 x 4.184 j/g/degrees x 37=1057338.64 j or 1057.33864Kj