ThermochemistryPart11 (1) - Chapter 5 Forms of Energy and...

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Chapter 5
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Forms of Energy and Energy Transfer
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Units of Energy
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A system which undergoes an adiabatic change (i.e., q = 0) and has work on it by the surroundings has A. w < 0, ΔE = 0 B. w > 0, ΔE > 0 C. w > 0, ΔE < 0 D. w < 0, ΔE > 0 E. w < 0, ΔE < 0
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Zeroeth Law of Thermodynamics
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First Law of Thermodynamics
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Which is an incorrect statement in view of the First Law of Thermodynamics? (A) The energy of a isolated system is conserved. (B) The energy of an open system is not conserved. (C) The energy of an closed system is conserved. (D) ΔE = q - pΔV (E) ΔE = q + W
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Enthalpy
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Calcium hydroxide, which reacts with carbon dioxide to form calcium carbonate, was used by the ancient Romans as mortar in stone structures. The reaction for this process is Ca(OH)2( s ) + CO2( g ) → CaCO3( s ) + H2O( g ) Δ H = -69.1 kJ What is the enthalpy change if 3.8 mol of calcium carbonate is formed? A. -18 kJ B. -69 kJ C. -73 kJ D. -260 kJ E. none of these choices is correct
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Relationship between E and  H
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For the following combustion reaction, what (in units of RT) has to be added to ΔE to make it equal ΔH? 2C4H10 (l) + 13 O2 (g)
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