Recent content by Evis

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    Enthalpy Calculation for 4B+3O2-->2B2O3 Reaction Using Hess's Law

    Homework Statement Calculate the enthalpy of the reaction 4B(s)+3O2(g)→2B2O3(s) given the following pertinent information: B2O3(s)+3H2O(g)→3O2(g)+B2H6(g), ΔH∘A=+2035kJ 2B(s)+3H2(g)→B2H6(g), ΔH∘B=+36kJ H2(g)+1/2O2(g)→H2O(l)...
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    Is freezing point always depressed by a solute?

    Do amorphous solids not have changes of state?
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    Is freezing point always depressed by a solute?

    Homework Statement Is the freezing point always depressed by a solute even if solute-solvent interactions are stronger than solute-solute and solvent-solvent interaction? What about amorphous solids? 2. Relevant knowledge According to my chemistry teacher's powerpoints, the freezing point is...
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    If I throw an iron ball at a magnet, the ball will bounce of

    Oh dear! I copy pasted the question. The question is this: If I throw an iron ball at a magnet, the ball will bounce off of the magnet, but be slowed by its attraction to the magnet. Since energy cannot be created or destroyed, where does the original kinetic energy go?
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    If I throw an iron ball at a magnet, the ball will bounce of

    Heat seems like the easy answer, but interparticle collisions should decrease as the ball slows.
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