H values - PowerPoint PPT Presentation

Energy

Energy. The ability to do work or transfer heat. Work: Energy used to cause an object that has mass to move. Heat: Energy used to cause the temperature of an object to rise. Potential Energy. Energy an object possesses by virtue of its position or chemical composition. 1. KE =  mv 2.

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Section 1.5

Section 1.5 1. By imagining tangents at he indicated points state whether the slope is positive, zero or negative at each point. P 2. P 1. P 3. P 2. P 1. 2. Use the red tangent lines shown to find the slopes of the curve at the points of tangency.

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Energetics

Energetics. IB Topics 5 &amp; 15 PART 2: Calculating  H via Bond Enthalpies &amp; Hess’s Law. Above: thermit rxn. BOND ENTHALPIES. Enthalpy change (  H) can also be calculated directly from bond enthalpies .

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