ULANGAN HARIAN SEMESTER GENAP 25
Flashcard
•
Physics
•
11th Grade
•
Hard
Ratna Khaa
FREE Resource
Student preview

14 questions
Show all answers
1.
FLASHCARD QUESTION
Front
Jika 2 kg air pada 30°C dicampur dengan 1 kg air pada 90°C, maka suhu campurannya adalah …
Back
50°C
Answer explanation
m1cΔT1=m2cΔT2
2(T−30)=1(90−T) = 2T−60=90−T
= 3T=150⇒T=50°C
2.
FLASHCARD QUESTION
Front
Kalor lebur es 334.000 J/kg. Berapa kalor diperlukan untuk melelehkan 2 kg es?
Back
668.000J
Answer explanation
Q=mL=2⋅334.000=668.000J
3.
FLASHCARD QUESTION
Front
Konstanta Boltzmann dalam teori kinetik gas memiliki satuan …
Back
J/K
Answer explanation
Satuan k=R/NA adalah J/K.
4.
FLASHCARD QUESTION
Front
Jika suhu suatu gas dinaikkan, maka energi kinetik molekul gas akan …
Back
bertambah
Answer explanation
suhu naik → energi kinetik naik.
5.
FLASHCARD QUESTION
Front
Gas ideal menempati volume 5 liter pada tekanan 1 atm dan suhu 273 K. Maka jumlah mol gas adalah …
Back
0,22 mol
Answer explanation
n=PV/RT=1.5/0,082⋅273≈5/22,3865≈0,22 mol
6.
FLASHCARD QUESTION
Front
Dalam proses isotermal, jika tekanan gas dinaikkan 3 kali, maka volumenya menjadi …
Back
sepertiga
Answer explanation
Isotermal: PV=konstan, maka V∝ 1/P
7.
FLASHCARD QUESTION
Front
Hukum II Termodinamika menyatakan bahwa …
Back
Entropi sistem tertutup selalu bertambah
Answer explanation
Entropi sistem tertutup selalu bertambah
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