calorimetria + princ I al termodin Flashcards

1
Q

PRINC I al TERMODINAMICII

A

in orice transf, variatia energ int depinde doar de starile initiala si final ale sist, fiind independ de stariile intermediare prin care trece sist.
ΔU=U2-U1=Q-L (U2>U1)

                             SAU

cald primita de un sist e egala cu variatia energ int a sist + lucrul mec
Q= ΔU+L

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2
Q

def cal

A

e o componenta a termodin care elaboreaza si studiaza metodele de masurare a caldurii si coeficintentiilor calorici

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3
Q

princ echil termic

A

inntr un sist izolat, 2 corpuri cu temp diferite, care sunt aflate in contact, dupa un anumit timp ajung la echil termic

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4
Q

princ transformarii inverse

A

cald primita de un corp, pt a si marii tempt cu un anumit nr de grade este egala cu temp cedata de acelasi corp cand se raceste cu ecelasi nr de grade

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5
Q

princ egalitatii schimbului de cald

ala cu n subsisteme

A

sist termodin care e format din n subsist este izolat termic (Q=0) si izolat mecanic (L=0) de ext, atunci cand energ int se conserva (U=0 , ΔU=0)

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6
Q

Ecuatia calorimetrica (formula)

A

Qp=IQcI J/N=m metru

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