Draw a hearing curve for water to decide how to solve how much energy is released into the surroundings from a cup of coffee 140g cooling down from 75 to 20 degrees celsius

If two atoms are bonded to a central atom with no lone pairs,how will they be arranged

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The bond energy for the van der waals bond between two helium atoms is 7.9×10−4ev. assuming that the average kinetic energy of a helium atom is (3/2)kbt, at what temperature is the average kinetic energy equal to the bond energy between two helium atoms