2 blocks put in contact: finding temp at thermal equilibrium

[SaintJude]

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2 blocks are put in contact, but thermally insulated from outside. Is final temp easy to find with simple calc? If so, how?

 

[MedPR]

I would guess the answer is -12.5C, but not sure. If the blocks are in thermal equilibrium, then neither block is causing a temperature change in the other.

 

[chiddler]

have answer? I think it would be as simple as you would imagine. Heat is not being transferred outside the blocks, and energy is conserved....

just average them.

 

[milski]

Yes, it's fairly simple. Since no energy is lost/gained by the system, ΔT1 * m1 * k1 + ΔT2 * m2 * k2 = 0; If the masses and the substance is the same for the two blocks, it's just ΔT1+ΔΤ2=0.