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Calculate the standard enthalpy change for the reaction between 2.00 moles of liquid ethanol (C2H5OH) and 3.50 moles of gaseous oxygen (O2) to form carbon dioxide (CO2) gas and liquid water (H2O) at 25°C and standard pressure. The balanced chemical equation for the reaction is C2H5OH + 3O2 → 2CO2 + 3H2O. (The molar enthalpies of formation for C2H5OH, CO2, and H2O are -277.6 kJ/mol, -393.5 kJ/mol, and -285.8 kJ/mol, respectively.)
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2 days
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Chemical thermodynamics
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50
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How can the amount of lead in a water sample be quantified using voltammetry?
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Jan 29
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Analytical Chemistry
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53
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Calculate the Gibbs free energy change for the electrochemical reaction in which 2 moles of electrons are transferred from a zinc electrode to a copper electrode. The standard reduction potentials are E°(Cu²⁺/Cu) = 0.34 V and E°(Zn²⁺/Zn) = -0.76 V. What is the spontaneity of the reaction under standard conditions?
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Jan 23
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ElectroChemistry
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57
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What is the Sternberg's triarchic theory?
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Jan 20
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Psychology
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7
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According to the reactance theory, what is the underlying cause of people's resistance to persuasion?
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Jan 20
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Psychology
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51
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What does the cognitive model suggest about delusional thinking?
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Jan 20
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Psychology
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22
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Who developed the ABC model in Rational Emotive Behaviour Therapy (REBT)?
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Jan 16
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Psychology
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26
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What is the size-contrast illusion?
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Jan 15
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Psychology
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18
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What works through chemical reactions that change the rock?
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Jan 8
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Science
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22
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What type of reaction causes two substances to combine to make a single substance?
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Jan 8
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Science
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24
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What is an animal that picks up pollen on its body and carries it to another flower called?
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Jan 6
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Science
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7
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How many electrons can be accommodated in the first electron shell's orbital?
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Dec 27, 2024
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Science
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