Science reviewer

Which of the following is not an example of non-spontaneous reaction?

• Spoilage of food

• Keeping the food fresh from spoilage.

• Cooling of water.

• Breakage of egg.

Paulo observes the waterfalls used in hydroelectric powerplant. He found out that it flows naturally that makes the turbine rotates. What makes this so?

• Spontaneous process tends the heat to flow from lower temperature to cooler temperature.
  
  

• Spontaneous process requires work to make it possible.

• Spontaneous process occurs naturally.

• Spontaneous process needs heat pump to exist.

What is the function of the heat engine?

• It converts chemical energy into mechanical energy.

• It converts mechanical energy into chemical energy.

• It converts thermal energy into chemical energy.

• It converts thermal energy into mechanical energy.

What is the function of a heat pump?

• Transfer of heat from a warmer reservoir to a colder reservoir

• Transfer heat to a colder reservoir.

• Transfer heat from a colder reservoir to a warmer reservoir.

• Change heat.

Distinguish the process as spontaneous or non-spontaneous process.

Melting of ice.

Distinguish the process as spontaneous or non-spontaneous process.

Rusting of iron nail.

Distinguish the process as spontaneous or non-spontaneous process.

Marble going down the spiral.

Distinguish the process as spontaneous or non-spontaneous process.

Going uphill

Distinguish the process as spontaneous or non-spontaneous process.

Keeping the food fresh from spoilage

Which of the following is not an example of spontaneous reaction?

• Water falling from waterfalls.

• Keeping the food fresh from spoilage.

• Drying of leaves.

• Rusting of iron.