Thermochemistry Test Practice L1

___________________ is the capacity to do work or supply heat.

• energy

• heat changes

• specific heat

• thermochemistry

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-5

When heat flows from system to the surroundings that is an example of an ________________ process.

• exothermic

• endothermic

Tags

NGSS.HS-PS3-4

What device is used to measure the amount of heat involved in a chemical reaction or physical process?

• barometer

• calorimeter

• thermometer

Tags

NGSS.HS-PS3-4

H₂ + 2 C + N₂ + 270.3 kJ --> 2 HCN
Is this reaction endothermic or exothermic?

• Endothermic 
• Exothermic

Tags

NGSS.HS-PS1-4

NGSS.HS-PS3-1

A chemical reaction that absorbs heat from the surroundings is said to be __________ and has a __________ ΔH at constant pressure.

• endothermic; positive
• endothermic; negative
• exothermic; negative
• exothermic; positive

Tags

NGSS.HS-PS1-4

What kind of graph is this?

• endothermic
• exothermic

Tags

NGSS.HS-PS1-4

Refer the the following question:
2N₂ + 3H₂ --> 2NH₃ + 46 kJ
How much energy would be produced if only 1 mol of nitrogen was reacted?

• 92 kJ
• 0.143 kJ
• 23 kJ
• 15 kJ

Tags

NGSS.HS-PS1-4

NGSS.HS-PS3-1

How much energy must be used to produce 4.75 mol of gaseous water?
H₂O (l) +  44.0 kJ --> H₂O (g)

• 207 kJ
• 9.36 kJ
• 206.8 kJ
• 9.362 kJ

Tags

NGSS.HS-PS1-4

4 PCl₅ + 3438 kJ --> P₄ + 10 Cl₂
How much energy is required to produce each mole of chlorine?

• 687.6 kJ
• 859.5 kJ
• 343.8 kJ
• 245.8 kJ

Tags

NGSS.HS-PS3-1

What mass of P₄ must be reacted to produce 5905 kJ of energy?
P₄ + 6Cl₂ --> 4PCl₃ + 2439 kJ

• 25.43 g
• 563.0 g
• 2.421 g
• 300.0 g

Tags

NGSS.HS-PS1-4

NGSS.HS-PS3-1