Which of the letters (A-D) represents the potential energy of the products?

• A
• B
• C
• D

Tags

NGSS.HS-PS1-4

Which of the letters (A-D) represents the potential energy of the reactants?

• A
• B
• C
• D

Tags

NGSS.HS-PS1-4

What kind of reaction is this?

• endothermic
• exothermic

Tags

NGSS.HS-PS1-4

A sample of iron receives 50J of heat energy that raises the temperature of the iron 25.0°C. If iron has a specific heat of 0.10 J/g°C, what is the mass of the iron sample?

• 25g
• 30g
• 20g
• 50g

Tags

NGSS.HS-PS3-1

žDetermine the energy (in J) required to raise the temperature of 100.0 g of water from 20.0 C to 85.0 C? The specific heat of water is 4.184 J/g°C

• 500 J
• 4,182 J
• 27,196 J
• 27200 J

Tags

NGSS.HS-PS3-1

Consider the reaction: 2 H₂O + energy --> 2H₂ + O₂

• exothermic, releasing energy
• exothermic, absorbing energy
• endothermic, absorbing energy
• endothermic, releasing energy

Tags

NGSS.HS-PS1-4

The Law of _______________ states that energy cannot be created nor destroyed only transferred 

• Specific Heat
• Conservation of Energy
• Exothermic Reaction
• Potential Energy

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

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