Asked by Stuck
I am designing a lab right now, and I want to know: if I fill a beaker with cold water from the tap and submerge a sample of solid metal, after a couple of minutes, the metal should be the same temp as the water, right? Would it be quicker to use hot water instead?
Answers
Answered by
bobpursley
What metal? You don't want an active metal, or it will react with the water. I remember a college professor that submerged Magnesium and wondered what the bubbles forming were. Duh.
Yes, I would use slighly cooled room temp water (room water with one ice cube added, remove the ice cube before adding the warm metal. I would heat the metal in boiling water, so you know what the initial temp is. Heat losses are significant, so use a styrofoam beaker or styrofoam cup. If you know the mass of the cup, and the mass of the metal, then you can mass the final system (cup, water, metal) to get the mass of the water.
Yes, I would use slighly cooled room temp water (room water with one ice cube added, remove the ice cube before adding the warm metal. I would heat the metal in boiling water, so you know what the initial temp is. Heat losses are significant, so use a styrofoam beaker or styrofoam cup. If you know the mass of the cup, and the mass of the metal, then you can mass the final system (cup, water, metal) to get the mass of the water.
Answered by
Stuck
Ok, thanks a lot! It's an unknown metal. I'm sure it wouldn't be anything reactive in water. :)
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