Answer:
a) The work is 628370 J or 150 kcal
b) The Delta energy is 1100 kcal
Explanation:
Pa= [tex]\frac{N}{m^{2} }[/tex]
1 Cal= [tex]w= 628370J\frac{1 Cal }{4,1868J} =150083.5 cal\\w= 150.083 kcal[/tex] J
volume:
v1= 12 [tex]m^{3}[/tex]
v2= 18.2 [tex]m^{3}[/tex]
pressure:
[tex]1 atm = 101325 Pa[/tex]
a).
[tex]w= p* v[/tex]Δ
[tex]w= 101350pa * (18.2-12) m^{3}[/tex]
[tex]w= 628370 Pa* m^{3}[/tex]
[tex]w= 628370 \frac{N}{m^{2} }* m^{3}[/tex]
[tex]w= 628370 J[/tex]
b).
1 Law thermodynamic
[tex]Q-W=U[/tex]Δ
[tex]1250 kcal - 150 kcal = 1100 kcal[/tex]
the delta of energy