Answer:
* android noises *
Explanation:
I don’t think they have to
The standard formation equation for glucose C6H12O6(s) that corresponds to the standard enthalpy of formation or enthalpy change ΔH°f = -1273.3 kJ/mol is
C(s) + H2(g) + O2(g) → C6H12O6(s)
and the balanced chemical equation is
6C(s) + 6H2(g) + 3O2(g) → C6H12O6(s)
Using the equation for the standard enthalpy change of formation
ΔHoreaction = ∑ΔHof(products)−∑ΔHof(Reactants)
ΔHoreaction = ΔHfo[C6H12O6(s)] - {ΔHfo[C(s, graphite) + ΔHfo[H2(g)] + ΔHfo[O2(g)]}
C(s), H2(g), and O2(g) each have a standard enthalpy of formation equal to 0 since they are in their most stable forms:
ΔHoreaction = [1*-1273.3] - [(6*0) + (6*0) + (3*0)]
= -1273.3 - (0 + 0 + 0)
= -1273.3
Carotenoids are widely known as provitamin A, while there is an increasing interest in their role as antioxidants. For this purpose carrot roots are cut to slices (width 2 mm, length 1 cm). The extraction yield of carotenes is observed at different temperatures (20°C, 40°C, and 60°C) using ethanol and 2-propanol. Initially, 25 g of cut carrot samples are added to 100 g of 96% ethanol. Carrot slices are extracted in water bath (20°C, 40°C, 60°C), shake after every 10 min, and after every hour of extraction 5 ml sample are s taken and mixed with petroleum ether (20 ml). Water is
added for the separation of phases, and after the separation the petroleum-ether-carotenoid phase is made up to the volume of 50 ml.
A dry cells has b) The graphite rod does not undergo reduction, even though it is the cathode<span>.</span>