soal ipa kls 7 suhu kalor pemuaian

Andi is boiling water to make tea while contemplating the verse:

"And We created from water every living thing." (Quran, Al-Anbiya: 30)

0.5 kg of water is heated from 25°C to 75°C. The specific heat of water is 4200 J/kg°C.

How much heat energy is needed to heat the water?

• 84.000 J

• 105.000 J

• 126.000 J

• 150.000 J

In a science lab, students observed the expansion of metal. The teacher reminded them of Surah Al-Mulk: 3:

"He who created the seven heavens in layers. You will never see anything unbalanced."

A metal rod expands 0.15 cm when its temperature is raised from 20°C to 120°C. The coefficient of linear expansion of metal is 0.000015/°C.

What was the initial length of the metal rod?

• 50 cm

• 75 cm

• 100 cm

• 150 cm

In an experiment, 1 kg of ice melted completely at 0°C. While waiting for the ice to melt, students read Surah An-Nur: 43:

"Do you not see that Allah drives the clouds, then gathers them together and makes them overlap, then you see rain coming out from their gaps?"

The heat of fusion of ice = 334,000 J/kg.

How much heat is needed to melt the ice?

• 33.400 J

• 334.000 J

• 3.340.000 J

• 334.000 kJ

Lina heats 2 kg of metal from 30°C to 80°C. The heat used is 42,000 J. He reflects on how careful Allah is in His creation:

"Allah created everything and He is the Sustainer." (QS. Az-Zumar: 62)

What is the specific heat of the metal that Lina uses?

• 300 J/kg°C

• 420 J/kg°C

• 700 J/kg°C

• 840 J/kg°C

A technician noticed that the railroad ties were loose. He remembered QS. Al-Rahman: 7-8:

"And He has raised the heavens and laid down the scales (of justice), so that you do not transgress."

Why aren't the rail connections made tight?

• To speed up the train

• So it doesn't rust

• Prevent damage during expansion

• Holds tire pressure

In creating a new thermometer scale, a student refers to the fact that water boils at 100°C and freezes at 0°C. He is reminded of Surah Al-Baqarah: 164:

"And the alternation of night and day, and the water that Allah sends down from the sky..."

If the thermometer scale reads 75 at the boiling point of water and 25 at the freezing point, then 50°C on the Celsius thermometer is... on the new thermometer.

• 40

• 45

• 50

• 55

Nina is heating 200 grams of water from 25°C to 75°C. While heating, she recalls Surah An-Nahl: 5:

"And He created livestock for you; in them is warmth (wool).

The specific heat of water = 4200 J/kg°C.

How much heat is needed?

• 21.000 J

• 42.000 J

• 84.000 J

• 100.000 J

Ali is studying temperature conversions. He reads that 0°C = 32°F and 100°C = 212°F. He remembers Allah's words:

"He has made the night and the day alternate." (Quran, An-Nur: 44)

What is 37°C on the Fahrenheit scale?

• 96.6°F

• 98.6°F

• 100.0°F

• 102.6°F

In an experiment, a student heats 0.5 kg of a substance until its temperature rises from 25°C to 45°C using 21,000 J of energy.

He is amazed by the regularity of the law of heat and recalls Surah Al-Mulk: 14:

"Does He not know what He creates?"

What is the specific heat capacity of the substance?

• 2.100 J/kg°C

• 1.800 J/kg°C

• 2.000 J/kg°C

• 2.100 J/°C

In science class, students read about the greater expansion of gases compared to solids. The teacher included a quote from Surah Ali Imran: 190:

"Indeed, in the creation of the heavens and the earth and the alternation of night and day, there are signs for men of understanding."

Why do gases expand more than solids?

• Gas has no fixed shape

• Weak interparticle attraction

• The specific heat is large

• Light gas