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jbhelfrich t1_j8h3h1p wrote

Reply to comment by Awkward-Motor3287 in Is there a formula to know the temperature of fluids after mixing ? by malahchi

If the two liquids are the same (C_Liquid1 = C_Liquid2) that's exactly what you do get. But the OP asked for a generalized answer for any two fluids.

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Cheetahs_never_win t1_j8jhbz3 wrote

No - it's generally a good approximation if at the two states, the fluid's properties are approximately the same.

That's not always true for huge differences in temperature and/or pressure.

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