First Law of Thermodynamics 2024

What does thermal equilibrium refer to?

• The state where heat is not transferred

• The state where two systems have the same temperature

• The state where pressure is constant

• The state where two systems have different temperatures

What is the Zeroth Law of Thermodynamics?

• Heat flows from hot to cold

• If two systems are in thermal equilibrium with a third system, they are in thermal equilibrium with each other

• Work done on a system increases its internal energy

• Energy cannot be created or destroyed

What is the primary difference between heat and temperature?

• Heat is always higher than temperature

• Heat is a measure of energy transfer, while temperature is a measure of thermal energy

• Heat is measured in degrees, while temperature is measured in joules

• Heat can be felt, while temperature cannot

In an isochoric process, what is true about the work done?

• Work is always negative

• Work is done by the surroundings

• No work is done

• Work is done on the surroundings

What is the relationship between Cp and Cv for an ideal gas?

• Cp = 2Cv

• Cp = Cv

• Cp = Cv - R

• Cp = Cv + R

What does an adiabatic process involve?

• Constant volume

• Heat transfer into the system

• No heat transfer

• Constant pressure

What is the significance of the first law of thermodynamics?

• It defines temperature

• It only applies to mechanical systems

• It relates heat, work, and internal energy

• It states that energy can be created

What happens to the internal energy of an ideal gas during free expansion?

• It decreases

• It increases

• It remains constant

• It becomes unpredictable

Which of the following processes is characterized by constant pressure?

• Isochoric process

• Isothermal process

• Isobaric process

• Adiabatic process

What is the definition of specific heat capacity?

• The amount of heat required to raise the temperature of a unit mass by one degree Celsius

• The total heat energy contained in a substance

• The heat required to change the state of a substance without changing its temperature

• The heat energy lost by a substance when it cools