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coldgirl [10]
3 years ago
14

A particular power source creates electricity through the use of giant magnets that are rotated to create a flow of electrons. T

his electricity is then directed:
A. from the electric generator to electric outlets in homes
B. from the electric device to an electric outlet
C. from the electric generator to a ground wire
D. to be stored in batteries, or "tanks."
Chemistry
2 answers:
Sloan [31]3 years ago
6 0
From the electric generator to electric outlets in homes
jeka943 years ago
4 0

Answer:The correct answer is option B.

Explanation:

The generation of the electricity due to rotation of magnet to create a flow of electrons is based on the Faraday's law of induction.

The law states that ' <em>whenever a conductor is kept in the varying magnetic field an electromotive force gets induced and if the circuit of conductor is closed induced emf will cause flow of current in a circuit'.</em>

The current generated in then sent through the transformer to increase the potential so as to further distribute the current in various electrical lines according to demand.

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The enthalpy change of the reaction when sodium hydroxide and sulfuric acid react can be calculated using the mass of solution, temperature change, and specific heat of water.

The balanced chemical equation for the reaction can be represented as,

H_{2}SO_{4}(aq) + 2NaOH (aq) ----> Na_{2}SO_{4}(aq) + 2H_{2}O(l)

Given volume of the solution = 101.2 mL + 50.6 mL = 151.8 mL

Heat of the reaction, q = m C .ΔT

m is mass of the solution = 151.8 mL * \frac{1 g}{1 mL} = 151.8 g

C is the specific heat of solution = 4.18 \frac{J}{g. ^{0}C}

ΔT is the temperature change = 31.50^{0}C - 21.45^{0}C = 10.05^{0}C

q = 151.8 g (4.18 \frac{J}{g ^{0}C})(10.05^{0}C) = 6377 J

Moles of NaOH = 101.2 mL * \frac{1L}{1000 mL}*\frac{1.00 mol}{L} = 0.1012 mol NaOH

Moles of H_{2}SO_{4} = 50.6 mL * \frac{1 L}{1000 mL} * \frac{1.0 mol}{1 L} = 0.0506 mol H_{2}SO_{4}

Enthalpy of the reaction = \frac{6377 J*\frac{1kJ}{1000J}}{0.0506 mol} = 126 kJ/mol

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