Forms of Energy Quiz

What does a positive value of work, w, represent in the system?

Work done by the system

According to the first law, what does the heat energy q added to a system primarily do?

Increase internal energy

What is the relationship between enthalpy and internal energy at constant pressure?

Enthalpy equals internal energy

In biochemical reactions, why is enthalpy change at constant pressure more relevant than internal energy change?

Pressure and volume changes are insignificant Signup and view all the answers

Why is the difference between ΔH and ΔU considered insignificant in most biochemical reactions?

Pressure and volume changes are minimal Signup and view all the answers

What aspect of enthalpy is of importance due to it being a state function?

Change in enthalpy between final and initial states Signup and view all the answers

What type of energy is converted when a heater is connected to the mains and placed in water?

Electrical energy Signup and view all the answers

What type of energy is converted when the chemical energy in ATP is used in skeletal muscles?

Mechanical energy Signup and view all the answers

What type of energy is released when liquefied petroleum gas is burnt in the kitchen?

Heat and light Signup and view all the answers

What type of energy holds atoms together in molecules?

Chemical potential energy Signup and view all the answers

What type of energy binds protons and neutrons in nuclei?

Nuclear energy Signup and view all the answers

What type of energy is converted in a Daniel cell?

Electrical energy Signup and view all the answers

What type of system allows for energy exchange but not matter exchange with the surroundings?

Closed system Signup and view all the answers

What is an example of a system that allows neither energy nor matter exchange with its surroundings?

Hot water in a tightly covered thermos flask Signup and view all the answers

What does an adiabatic process involve?

No heat transferred across the boundary Signup and view all the answers

Which type of change occurs at a constant temperature?

Isothermal change Signup and view all the answers

What happens to the temperature of a tightly covered thermos flask containing hot water over time?

The temperature decreases Signup and view all the answers

What is an example of a closed system?

Cold water in a corked bottle Signup and view all the answers

What type of reactions take place in the human body?

Isothermal reactions Signup and view all the answers

Which of the following correctly describes temperature?

Temperature measures the total amount of kinetic energy of a material Signup and view all the answers

Which of the following is an example of a state function?

The enthalpy change of a system Signup and view all the answers

What are the possible units for temperature mentioned in the text?

Kelvin or Fahrenheit Signup and view all the answers

What determines the enthalpy change in a system?

The initial and final states of the system Signup and view all the answers

What does the first law of thermodynamics state?

Energy can only be converted from one form to another Signup and view all the answers

Which of the following is an extensive property?

Volume Signup and view all the answers

In a galvanic cell, what type of energy conversion takes place?

Chemical energy is converted to electrical energy Signup and view all the answers

What is an intensive property?

A property that does not depend on the amount of material present Signup and view all the answers

Which mathematical formula represents the first law of thermodynamics as mentioned in the text?

$ΔU = q —w$ Signup and view all the answers

What is the enthalpy change when glucose is oxidized by burning it in oxygen and when it is oxidized in living cells?

The enthalpy change is the same Signup and view all the answers

What is given positive quantities in the sign convention used for heat and work?

Heat absorbed by the system and work done by the system Signup and view all the answers

Forms of Energy Quiz

Questions and Answers

What does a positive value of work, w, represent in the system?

According to the first law, what does the heat energy q added to a system primarily do?

What is the relationship between enthalpy and internal energy at constant pressure?

In biochemical reactions, why is enthalpy change at constant pressure more relevant than internal energy change?

Why is the difference between ΔH and ΔU considered insignificant in most biochemical reactions?

What aspect of enthalpy is of importance due to it being a state function?

What type of energy is converted when a heater is connected to the mains and placed in water?

What type of energy is converted when the chemical energy in ATP is used in skeletal muscles?

What type of energy is released when liquefied petroleum gas is burnt in the kitchen?

What type of energy holds atoms together in molecules?

What type of energy binds protons and neutrons in nuclei?

What type of energy is converted in a Daniel cell?

What type of system allows for energy exchange but not matter exchange with the surroundings?

What is an example of a system that allows neither energy nor matter exchange with its surroundings?

What does an adiabatic process involve?

Which type of change occurs at a constant temperature?

What happens to the temperature of a tightly covered thermos flask containing hot water over time?

What is an example of a closed system?

What type of reactions take place in the human body?

Which of the following correctly describes temperature?

Which of the following is an example of a state function?

What are the possible units for temperature mentioned in the text?

What determines the enthalpy change in a system?

What does the first law of thermodynamics state?

Which of the following is an extensive property?

In a galvanic cell, what type of energy conversion takes place?

What is an intensive property?

Which mathematical formula represents the first law of thermodynamics as mentioned in the text?

What is the enthalpy change when glucose is oxidized by burning it in oxygen and when it is oxidized in living cells?

What is given positive quantities in the sign convention used for heat and work?

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