Thermochemistry & Final Exam Review

In an exothermic process the surrounding looses heat. 

• True
• False

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-3

In an endothermic reaction the system is releasing energy.

• True
• False

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

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)

• 209 kJ

• 9.36 kJ

• 206.8 kJ

• 9.362 kJ

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-PS1-7

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

H₂ + Cl₂ --> 2 HCl + 1845 kJ
Is this reaction endothermic or exothermic?

• Endothermic 
• Exothermic

Tags

NGSS.HS-PS1-4

NGSS.HS-PS3-1

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

• Endothermic 
• Exothermic

Tags

NGSS.HS-PS1-4

The amount of thermal energy required to raise the temperature of one gram of a substance by 1^o C is known as:

• Specific heat

• Heat of fusion

• Heat of vaporization

• Melting point

Temperature is a measure of the...

• total energy in a substance
• total kinetic energy in a substance
• average potential energy in a substance
• average kinetic energy of molecules in a substance

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4