hej, dwa zadania w zalczniku.
dzieki wielkie, bedzie naj.
m1 = 2kg
t1= 80C
m2 = 1 kg
t2=?
t3= 60C
m1(t1-t3)=m2(t3-t2)
2kg*20C = 1 kg (60-t2)
40C = 60C-t2
t2=20 C
2.
Z pierwszej zasady termodynamiki
ΔEw = W +Q
ΔEw = -2*10^5 J = - 200 kJ
Q =10 ^4 J = 10 kJ
W = ?? ( praza siły zewnętrznej)
W = ΔEw-Q
W= -200kJ -10 kJ = -220 kJ
Wgazu = -W
W gazu = 220 kJ
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m1 = 2kg
t1= 80C
m2 = 1 kg
t2=?
t3= 60C
m1(t1-t3)=m2(t3-t2)
2kg*20C = 1 kg (60-t2)
40C = 60C-t2
t2=20 C
2.
Z pierwszej zasady termodynamiki
ΔEw = W +Q
ΔEw = -2*10^5 J = - 200 kJ
Q =10 ^4 J = 10 kJ
W = ?? ( praza siły zewnętrznej)
W = ΔEw-Q
W= -200kJ -10 kJ = -220 kJ
Wgazu = -W
W gazu = 220 kJ