NOMOR 3.
Diketahui:
Keadaan awal ==> V, T, dan P1
Keadaan Kedua ==> V/8, T2, dan P2
gamma = 5/3
Ditanya :
T2 = ...T?
Pembahasan :
Kondisi Adibatik berlaku rumus
T1.V1^(gamma-1)=T2.V2^(gamma-1)
T1.V^(2/3) = T2.(V/8)^(2/3)
T1 = (1/8)^(2/3). T2
T1 = 1/4 T2
T2 = 4.T1
Jadi perbandingan suhu awal dan sekarang = T1 : T4 = 1: 4
NOMOR 6.
Keadaan 1 ==>
V1=V,
T1= 7°C,
P1= 10⁵ N/m²
Keadaan 2 ==>
V2=1/3V,
T2= 7°C = 280 K (karena isothermal),
P2= .... N/m²
Keadaan 3 ==>
V3=V (ke volume semula),
dQ₂₋₃ = 0 (karena adiabatik),
T3= ....
P3= .... N/m²
gamma = 1.4
T3 dan P3
Keadaan 1 ke 2 ISOTHERMAL
P₁.V₁ =P₂.V₂
10⁵.V = P₂. 1/3V
P₂ = 3.10⁵ N/m²
Keadaan 2 ke 3 ADIABATIK
T₂.V₂^(1.4-1) = T₃.V₃^(1.4-1)
T₃ = T₂. x (V₂/V₃)^(0.4)
T₃ = 280 (1/3V/V)^0.4=180.4 K
Tekanan Akhir
P₂V₂^(1.4)=P₃.V₃^(1.4)
P₃ = P₂. (V₂/V₃)^(1.4)
P₃ = 3.10⁵ N/m² (1/3 V/V)^(1.4)
P₃ = 6.4 10⁵ N/m²
Suhu dan Tekanan akhir : T₃ =180.4 K dan P₃ = 6.4 10⁵ N/m².
NOMOR 7.
Keadaan 1 = Adiabatik => Keadaan 2 =ISOTHERMAL => Keadaan 3
V1=V, V2 =1.5 V V3 = 0.5V
T1= 0°C = 273K T2 =....? T3=T2
P1= 760 mmHg P2 = ...? P3=..?
Keadaan 1 ke 2 ADIABATIK
Suhu Keadaan Kedua
T₂.V₂^(1.4-1) = T₁.V₁^(1.4-1)
T₂ = T₁ x (V₁/V₂)^(0.4)
T₃ = 273 (V/1.5V)^0.4=232.13 K
Tekanan Keadaan Kedua
P₂V₂^(1.4)=P₁.V₁^(1.4)
P₂ = P₁. (V₁/V₂)^(1.4)
P₂ = 760 mmHg (V/1.5V)^(1.4)
P₂ = 430.8 mmHg
Keadaan 2 ke 3 ISOTHERMAL
T₃ = T₂ = 232.13 K
P₃.V₃ =P₂.V₂
P₃.0.5V = 430.8. 1.5V
P₂ = 1292.4 mmHg
Suhu dan Tekanan akhir : T₃ =232.13 K dan P₃ = 1292.4 mmHg.
CMIIW.
Commit to be Fit.
Be better person.
Mr. Zeo.
" Life is not a problem to be solved but a reality to be experienced! "
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TERMODINAMIKA
NOMOR 3.
Diketahui:
Keadaan awal ==> V, T, dan P1
Keadaan Kedua ==> V/8, T2, dan P2
gamma = 5/3
Ditanya :
T2 = ...T?
Pembahasan :
Kondisi Adibatik berlaku rumus
T1.V1^(gamma-1)=T2.V2^(gamma-1)
T1.V^(2/3) = T2.(V/8)^(2/3)
T1 = (1/8)^(2/3). T2
T1 = 1/4 T2
T2 = 4.T1
SIMPULAN NOMOR 3
Jadi perbandingan suhu awal dan sekarang = T1 : T4 = 1: 4
NOMOR 6.
Diketahui:
Keadaan 1 ==>
V1=V,
T1= 7°C,
P1= 10⁵ N/m²
Keadaan 2 ==>
V2=1/3V,
T2= 7°C = 280 K (karena isothermal),
P2= .... N/m²
Keadaan 3 ==>
V3=V (ke volume semula),
dQ₂₋₃ = 0 (karena adiabatik),
T3= ....
P3= .... N/m²
gamma = 1.4
Ditanya :
T3 dan P3
Pembahasan :
Keadaan 1 ke 2 ISOTHERMAL
P₁.V₁ =P₂.V₂
10⁵.V = P₂. 1/3V
P₂ = 3.10⁵ N/m²
Keadaan 2 ke 3 ADIABATIK
T₂.V₂^(1.4-1) = T₃.V₃^(1.4-1)
T₃ = T₂. x (V₂/V₃)^(0.4)
T₃ = 280 (1/3V/V)^0.4=180.4 K
Tekanan Akhir
P₂V₂^(1.4)=P₃.V₃^(1.4)
P₃ = P₂. (V₂/V₃)^(1.4)
P₃ = 3.10⁵ N/m² (1/3 V/V)^(1.4)
P₃ = 6.4 10⁵ N/m²
SIMPULAN NOMOR 6
Suhu dan Tekanan akhir : T₃ =180.4 K dan P₃ = 6.4 10⁵ N/m².
NOMOR 7.
Diketahui:
Keadaan 1 = Adiabatik => Keadaan 2 =ISOTHERMAL => Keadaan 3
V1=V, V2 =1.5 V V3 = 0.5V
T1= 0°C = 273K T2 =....? T3=T2
P1= 760 mmHg P2 = ...? P3=..?
gamma = 1.4
Ditanya :
T3 dan P3
Pembahasan :
Keadaan 1 ke 2 ADIABATIK
Suhu Keadaan Kedua
T₂.V₂^(1.4-1) = T₁.V₁^(1.4-1)
T₂ = T₁ x (V₁/V₂)^(0.4)
T₃ = 273 (V/1.5V)^0.4=232.13 K
Tekanan Keadaan Kedua
P₂V₂^(1.4)=P₁.V₁^(1.4)
P₂ = P₁. (V₁/V₂)^(1.4)
P₂ = 760 mmHg (V/1.5V)^(1.4)
P₂ = 430.8 mmHg
Keadaan 2 ke 3 ISOTHERMAL
T₃ = T₂ = 232.13 K
P₃.V₃ =P₂.V₂
P₃.0.5V = 430.8. 1.5V
P₂ = 1292.4 mmHg
SIMPULAN NOMOR 7
Suhu dan Tekanan akhir : T₃ =232.13 K dan P₃ = 1292.4 mmHg.
CMIIW.
Commit to be Fit.
Be better person.
Mr. Zeo.