What is the product of the reaction of pentanoic acid with ethanol in the presence of a strong acid?

If the particles in a sample of matter have an orderly arrangement and move only in place, the sample is a

Is a pencil falling to the floor anon contact force, a force, or a contact force

Two metal blocks that have slightly different temperatures are placed next to one another. after five minutes, they both have lower but equal temperatures. according to the law of conservation of energy, what  most likelyhappened? energy was created inside the blocks.energy was destroyed inside the blocks.energy was absorbed into the blocks from outside the system.energy was transferred from the warmer block to the cooler block.