Hw Due 6 May Enthalpy and Table I Quizizz

According to Table I, which equation represents a change resulting in the greatest quantity of energy released?

• 2C(s) + 3H₂(g) --> C₂H₆(g)
• 2C(s) + 2H₂(g) --> C₂H₄(g)
• N₂(g) + 3H₂(g) --> 2NH₃(g)
• N₂(g) + O₂(g) --> 2NO(g)

Tags

NGSS.HS-PS1-4

NGSS.HS-PS3-1

Given the reaction:

CH₄(g) + 2O₂(g) --> CO₂(g) + 2H₂O(l)

What is the overall result when CH₄(g) burns according to this reaction?

• Energy is released and the ΔH is positive

• Energy is released and the ΔH is negative

• Energy is absorbed and the ΔH is positive

• Energy is absorbed and the ΔH is negative

Tags

NGSS.HS-PS1-4

Which statement correctly describes an endothermic chemical reaction?

• The products have lower potential energy than the reactants, and the ΔH is positive

• The products have lower potential energy than the reactants, and the ΔH is negative

• The products have higher potential energy than the reactants, and the ΔH is positive

• The products have higher potential energy than the reactants, and the ΔH is negative

Tags

NGSS.HS-PS1-4

Given the reaction:

2H₂(g) + O₂(g) --> 2H₂O(l) △H= - 571.6kJ

What is the approximate ΔH for the formation of 1 mole of H₂O(l)?

• -571.6 kJ

• +571.6 kJ

• -285.5 kJ

• +285.5 kJ

Tags

NGSS.HS-PS3-1

In table I the reaction of hydrogen and oxygen to form water is best described as

• exothermic, because energy is released

• endothermic, because energy is released

• exothermic, because energy is absorbed

• endothermic, because energy is absorbed

Tags

NGSS.HS-PS1-4

Define 'Enthalpy'

• a) Energy stored in the movement of molecules in a substance
• b) The opposite of temperature
• c) The temperature of a molecule
• d) Energy stored in the chemical bonds in a substance

Tags

NGSS.HS-PS1-4

N₂ + 3H₂ --> 2NH₃ + 33 kJ

• exothermic reaction

• endothermic reaction

• reaction with catalyst

• equilibrium reaction

Tags

NGSS.HS-PS1-4

What kind of equation is this: 2KI + MgCl₂ + 200KJ ----> 2KCl + MgI₂

• Endothermic

• Exothermic

Tags

NGSS.HS-PS1-4

What does temperature measure?

• Heat
• ºC
• Kinetic Energy
• Thermal Energy

Tags

NGSS.HS-PS3-4

The amount of energy required to raise the temperature 1ºC for every 1 gram is called____?

• Thermal Energy

• Specific Heat

• Temperature

• Kinetic Energy