DH

What does DH stand for in the context of thermodynamics?

• Dynamic Heat

• Differential Heat

• Delta Heat

• Enthalpy Change

In a chemical reaction, the term DH is often used to represent what?

• Change in entropy

• Change in enthalpy

• Change in temperature

• Change in pressure

Which of the following equations correctly represents the relationship involving DH in a chemical reaction?

In an exothermic reaction, what is the sign of DH?

• Positive

• Negative

• Zero

• Undefined

Tags

NGSS.HS-PS1-4

NGSS.HS-PS3-1

Which of the following processes would have a positive DH?

• Freezing of water

• Condensation of steam

• Melting of ice

• Combustion of gasoline

If DH is negative for a reaction, what can be inferred about the reaction?

• It is endothermic

• It is exothermic

• It is at equilibrium

• It is non-spontaneous

In the context of chemical reactions, DH is measured in which units?

• Joules

• Watts

• Kelvin

• Moles

Tags

NGSS.HS-PS1-4

Which law of thermodynamics is directly related to the concept of DH?

• First Law of Thermodynamics

• Second Law of Thermodynamics

• Third Law of Thermodynamics

• Zeroth Law of Thermodynamics

How does DH relate to the heat absorbed or released at constant pressure?

• DH is equal to the work done

• DH is equal to the heat absorbed or released

• DH is equal to the change in volume

• DH is equal to the change in entropy

In a calorimetry experiment, how is DH typically determined?

• By measuring the change in temperature

• By measuring the change in volume

• By measuring the change in pressure

• By measuring the change in mass

Tags

NGSS.HS-PS3-4