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Andratache05
a fost răspuns

Ce cantitatede gaz metan trebuie arsa pt incalzirea a 50 kg apa de la 8 grade C la 36 grade C (q gaz=33,44 MJ/kg CH2O=4185J/kg.K

Răspuns :

Se da:
m1=50kg
t1=8°C
t2=36°C
q2=33,44MJ=33440000J
c1=4185J/kg°C
m2=?kg

Formule:
Qu=Qt
c1*m1*Δt=q2*m2
c1*m1*(t2-t1)=q2*m2
m2=c1*m1*(t2-t1)/q2

Calcule:
m2=4185*50*(36-8)/33440000=0,175kg

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