Thermochemistry Practice

What is the tendency of systems in nature according to the big ideas in thermochemistry?

• Toward higher energy and lower entropy

• Toward lower energy and higher entropy

• Toward higher energy and higher entropy

• Toward lower energy and lower entropy

Tags

NGSS.HS-PS3-4

In an endothermic reaction, heat is ...

• taken in or absorbed

• given out or released 

Tags

NGSS.HS-PS1-4

In an exothermic reaction, how does the heat flow?

• From the surroundings to the system

• From the system to the surroundings

• Within the system only

• No heat flow occurs

Tags

NGSS.HS-PS3-4

What is the specific heat capacity of water given on Table B?

• 4.18 J/g°C

• 3.18 J/g°C

• 5.18 J/g°C

• 2.18 J/g°C

What is the heat value when heat is absorbed in a reaction (Table I)?

• Positive

• Negative

• Zero

• Undefined

Tags

NGSS.HS-PS1-4

In a heating curve, what happens to the temperature during the horizontal parts (plateaus)?

• Temperature remains the same

• Temperature increases

• Temperature decreases

• Temperature fluctuates

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

The three P's to remember in thermochemistry are (a)   , Phase Change, Potential Energy Change.

• Plateau, Phase Change, Potential En

• Pressure, Phase, Potential

• Plateau, Pressure, Potential

• Phase, Pressure, Plateau

Tags

NGSS.HS-PS3-4

The normal boiling point of water is (a)  

• 57°C

• 78°C

• 100°C

• 111°C

Tags

NGSS.HS-PS3-4

O_2(g) + 2 H_2 (g) → 2 H_2O (g) + Energy

• endothermic

• exothermic

Tags

NGSS.HS-PS1-4

What kind of equation is this: 2KI + MgCl₂ + 200kJ → 2KCl + MgI₂

• Endothermic

• Exothermic

Tags

NGSS.HS-PS1-4