Enthalpy

What does all our work, provides all our heat, can be stored to use later, and never, ever goes away?

• enthalpy

• energy

• our best friend

• chemical bonds

Tags

NGSS.HS-PS3-1

NGSS.HS-PS3-2

What are the two ways that internal energy can be transferred?

• by pressure, or by volume change

• by conduction, or by convection

• by heat, or by work

• by radiation, or by absorption

Tags

NGSS.HS-PS3-4

Work is energy transferred to the motion of ___

• particles

• atoms and molecules

• objects

• humans

Heat is energy transferred to the motion of ___

• trebuchets

• atoms and molecules

• objects

• nuclear particles

Tags

NGSS.HS-PS3-2

NGSS.HS-PS3-4

For any given change in energy, the amount of heat or work done depends on ___

• only the starting state

• only the ending state

• only the starting state and the ending state

• the pathway taken

Tags

NGSS.HS-PS3-1

Change in energy is independent of the pathway. We call that ___

• a "state function"

• an "independent function"

• a "pathway function"

• a "universal constant"

Tags

NGSS.HS-PS1-4

To calculate a change in energy, the only thing that matters is ___

• the path taken

• the starting state

• the ending state

• the starting state and the ending state

Tags

NGSS.HS-PS3-1

Since energy, like volume, is a state function, we can very easily talk about the ___

• initial energy

• final energy

• total energy

• change in energy

Tags

NGSS.HS-PS1-4

NGSS.HS-PS3-1

What state function is based on the loss or gain of heat in a chemical reaction?

• energy

• enthalpy

• entropy

• volume

Tags

NGSS.HS-PS1-4

NGSS.HS-PS3-1

Which letter is used to represent enthalpy in an equation?

• capital Q

• lowercase t

• capital H

• lowercase e