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Why is it easier to wash with hot water than cold?

Why is it easier to wash with hot water than cold? I can understand the pores on the body open up when warm, but why does soap lather better?
Roger Inkpen from Portsmouth (Age 45-54)


One Response

  1. Soap is made by putting a salt ion onto a fatty molecular chain. That way one end (the salt end) is soluble in water while the other end is soluble in grease, dirt and oil. Basicaly the higher temperature allows the fatty molecular chain to more quickly combine with the greases and fats that you want to remove. The molecules vibrate more and the diffusion and combination necessary for washing happen more quickly.

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