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No, a change in temperature does not cause an observable change in mass. There are some limitations to this statement, however.

Though special relativity states that mass is dependent upon momentum, and increasing temperature leads to increasing kinetic energy of molecules, the mass of the overall system does not change when weighed. The reason for this result is that the system is weighed in a frame of reference where it has no net momentum. So though the mass of the individual particles changes slightly with temperature, the system will not appear to have a different mass when measured.

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Maude Kulas

Lvl 13
3y ago

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