
Kalor
Authored by EKO SULISTIYANTO
Science, Physics
7th Grade

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14 questions
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1.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Sepotong tembaga memerlukan kalor 615 kJ untuk melebur. Jika kalor lebur tembaga 205.000 J/kg, massa tembaga adalah .... kg
A. 3
B. 5
C. 7
D. 9
2.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Air sebanyak 0,2 kg bersuhu 25oC dipanaskan dengan kalor sebesar 42.000 Joule. Bila kalor jenis air = 4200 J/kg oC, maka besar suhu akhir air adalah…..
A. 100oC
B. 80oC
C. 75oC
D. 50oC
3.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Air massanya 5 gr dipanaskan dari 10°C sampai 40°C. Jika kalor jenis air 1 kal/ gr°C, banyaknya kalor yang diperlukan untuk suhu air adalah
A. 100 kalori
B. 150 kalori
C. 200 kalori
D. 400 kalori
4.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
2 kg air dari suhu 24°C dipanaskan menjadi 90°C. Jika kalor jenis 4.200 Joule/kg°C, maka kalor yang diterima air adalah …
A. 336.000 Joule
B. 259.200 Joule
C. 554.400 Joule
D. 543.600 Joule
5.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Untuk menaikkan suhu 5 kg air dari 15°C menjadi 40°C diperlukan kalor sebanyak….
(kalor jenis air 4,2 × 103 J/Kg° C)
A. 525.000 J
B. 420.000 J
C. 150.000 J
D. 21.000 J
6.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Kalor yang diperlukan untuk menaikan suhu 1 kg suatu zat cair yang mempunyai kalor jenis 300 J/Kg.K dari 20oC menjadi 30oC adalah….
A. 3000 J
A. 6000 J
A. 9000 JA.
A. 30000 J
7.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Air sebanyak 50 gram bersuhu 0 °C ditambahkan ke 100 gram air bersuhu 90 °C, suhu akhir campuran tersebut adalah ....
15 ºC
45 ºC
60 ºC
75 ºC
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