Answers by TammieMcgoug

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Calculate the standard enthalpy change for the vaporization of water at its normal boiling point of 100 degrees Celsius and a pressure of 1 atm. The molar enthalpy of vaporization for water is 40.7 kJ/mol. What is the amount of heat required to vaporize 100 g of water?

answered 2 days ago in Chemical thermodynamics

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Calculate the standard enthalpy change for the fusion reaction of 50g of ice at 0°C with 450g of liquid water at 25°C. The molar enthalpy of fusion of ice is 6.01 kJ/mol and the specific heat capacity of water is 4.18 J/g·°C. Assume there are no heat losses to the surroundings.

answered 2 days ago in Chemical thermodynamics

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A question for the student to solve could be: If a certain equilibrium reaction is exothermic, and the concentration of reactant A is increased while the concentration of product B is decreased, predict the change in the equilibrium constant value (K) and explain your reasoning by applying Le Chatelier's principle.

answered Jan 22 in Chemical reactions

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A chemistry student is given a sample of an unknown compound and is asked to determine its molecular formula and possible functional groups using mass spectrometry. The mass spectrum of the compound shows a molecular ion peak at m/z 158 and three intense fragmentation peaks at m/z 132, 104, and 77. Using this information, determine the molecular formula and possible functional groups of the unknown compound.

answered Jan 22 in Analytical Chemistry

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Which theory explains how populations of organisms can change over time?

answered Jan 8 in Science

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What type of energy is stored in an object because of its position or shape?

answered Jan 8 in Science

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Hydroelectric power harnesses the energy of what?

answered Dec 30, 2024 in Science

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A wave that consists of vibrating electric and magnetic fields is called what?

answered Dec 30, 2024 in Science

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