Thermo

What phase change occurs when you start at D and end at E?

• Freezing

• Melting

• Condensing

• Vaporization

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

On which parts of the graph does the temperature remain the same?

• Between C and D

• Between D and E

• At C, D, or E

• On both flat sections

Tags

NGSS.HS-PS3-4

On which parts of the graph does the temperature change?

• Between C and D

• Between D and E

• At C, D, or E

• On both flat sections

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

A student has two liquids at the same temperature of 25°C. After the student mixes them, the temperature rises to 35°C. What type of reaction occurred?

• Exothermic

• Endothermic

• There is no way to tell

Tags

NGSS.MS-PS3-3

NGSS.MS-PS3-5

A positive ΔH means that:

• In order for the reaction to happen, heat must be input. It is exothermic

• In order for the reaction to happen, heat must be input. It is endothermic.

• When the reaction happens, heat is released. It is exothermic

• When the reaction happens, heat is released. It is endothermic

Tags

NGSS.HS-PS3-4

NGSS.HS-PS3-1

H₂ + ½ O₂ --> H₂O + 285kJ is an example of a(n)

• Electrical equation

• Heat equation

• Thermochemical equation

Tags

NGSS.HS-PS1-4

NGSS.HS-PS3-1

Zeroth law of thermodynamics is:

• Kinetic energy of molecules of a gas is zero

• Ideal gas does not contain molecules

• If two systems are thermal equilibrium third one is also in equilibrium

• Absolute zero temperature cannot be obtained

If the enthalpy ter (ΔH) is negative the reaction is ____.

• Endothermic

• Exothermic

• Neutral

Tags

NGSS.HS-PS1-4

Which principle states that the total entropy of an isolated system can never decrease over time?

• First Law of Thermodynamics

• Second Law of Thermodynamics

• Third Law of Thermodynamics

• Zeroth Law of Thermodynamics

ΔH is the same thing as:

• temperature

• q

• m

• C

Tags

NGSS.HS-PS1-4