For University Test Science 30-D1

Does which statement accurately describe the energy changes within the cylinders of a snowmobile engine as a result of the combustion of fuel?

• Chemical energy decreases and the total kinetic energy of the molecules decreases

• Chemical energy increases and the total kinetic energy of the molecules increases

• Chemical energy increases and the total kinetic energy of the molecules decreases

• Chemical energy decreases and the total kinetic energy of the molecules increases

The isotope of americium-241 undergoes alpha decay. Which of the following isotopes is a product of this decay?

• Berkelium-247

• Neptunium-237

• Berkelium-245

• Neptunium-245

Answer explanation

It starts with an N

Carbon-14 emits beta radiation as it undergoes nuclear decay. What isotope is a product of this nuclear decay?

• Nitrogen-14

• Beryllium-14

• Boron-11

• Carbon-12

Answer explanation

It was the letter O in it.

Describe the energy transformation of a coal-fired power generation station.

Calculate the energy released by the following combustion reactions.

C₂H_4(g)+302(g)−>2CO_2(g)+2H₂0_(g)

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It takes 700,000,000 J of energy to fully charge a battery in a certain device. When fully charged the battery has 595,000,000 J of chemical potential energy. The efficiency of the battery charger is

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Calculate the energy released by the following combustion reactions. PLEASE USE C4H10 INSTEAD! (INSTEAD OF C2H10)

C ₂ H _10(g) +2¹³ 0 _2(g) −>4CO _2(g) +5H ₂ O _(l)

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