For the following scenario, determine whether it is endothermic or exothermic:

AB  +  Energy   →   A  +  B

For the following scenario, determine whether it is endothermic or exothermic:

Feels warm to the touch.

For the following scenario, determine whether it is endothermic or exothermic:

A log burning, producing heat.

For the following scenario, determine whether it is endothermic or exothermic:

∆ H = - 127 kJ

For the following scenario, determine whether it is endothermic or exothermic:

Feels cool to the touch.

 ___NaCl(s)  + ___F₂(g)  →  ___NaF(s)  +  ___Cl₂(g)

How does a catalyst lower the activation energy of a reaction?

Using the graph, is the reaction above endothermic or exothermic?

Using the graph, what is the enthalpy of the reactants?

Using the graph, the system is _____ energy.

Using the graph, the enthalpy (∆H) of the reaction is _____.

Using the graph, the activation energy of the reaction is _____.

In a lab where students were combining baking soda and vinegar, the total mass of the reactants was 19.5 grams.  When the reaction was finished producing carbon dioxide, sodium acetate, and water, the mass of all three products should be ____________grams, according to the Law of Conservation of Mass.

Is this reaction endothermic or exothermic, and why?          

2NO₂ (g)  →  O₂ (g) +  2NO (g)          ∆H= +28 kJ

Identify whether the process is endothermic or exothermic process: water freezing

Identify whether the process is endothermic or exothermic process:

A + 2B + heat → C

Identify whether the process is endothermic or exothermic process: ΔH = -55

Identify whether the process is endothermic or exothermic process:

An ionic compound dissolves in solution and the solution feels warm.

Identify whether the process is endothermic or exothermic process: Photosynthesis

Which of the potential energy curves shown represents a catalyzed endothermic reaction?

Which statement is true about energy in this reaction?

CH_{4 (g)} + O_{2 (g)  →}  2 H₂O _(g) +  CO_{2 (g)  +} energy 

For the following scenario, determine whether it is endothermic or exothermic:

2Mg + O₂ →   2MgO + heat

The reaction represented by this diagram is _____.

Which of the following statements is true about catalysts?

Use the diagram below to answer the following question: What is the potential energy of the reactants?

Use the diagram below to answer the following question: What is the activation energy of the reaction?

Use the diagram below to answer the following question: The heat of reaction (enthalpy, ∆H) for this reaction is

Use the diagram below to answer the following question: This reaction is an _____ reaction.

Use the diagram below to answer the following question: If a catalyst is added, the heat of reaction (∆H) will _____.

Use the diagram below to answer the following question: If a catalyst is added, the activation energy will _____.

Use the diagram to complete the following question: What letter represents the ΔH for the reaction in the diagram above?

Use the diagram to complete the following question: What letter represents the ΔH for the reaction in the diagram above?

Use the diagram to complete the following question: What letter represents the activation energy for the reaction in the diagram above?

Use the diagram to complete the following question: What letter represents the reactants in the diagram above?

Use the diagram to complete the following question: What letter represents the products in the diagram above?

Identify whether the process is endothermic or exothermic process: An ionic compound dissolves in solution and the solution feels warm.

Identify whether the process is endothermic or exothermic process:

N­₂    +   3H₂      →    2 NH₃   +   22kcal 

Choose the coefficients that balance the following equation:

_____KClO₃(s)  →_____KCl(s)   +  _____O₂₍g)

When balanced, how many oxygens atoms are on the reactant side?

_____KClO₃(s)  →_____KCl(s)   +  _____O₂₍g)

Choose the coefficients that balance the following equation:

__AlBr₃(aq) + __K₂SO₄(aq) →__KBr(aq) + __Al₂(SO₄)₃(aq)

When balanced, how many alumnium atoms are on the product side?

__AlBr₃(aq) + __K₂SO₄(aq) →__KBr(aq) + __Al₂(SO₄)₃(aq)

Choose the answer that represents the following balanced word equation:

Aqueous sodium sulfate and aqueous barium chloride produce solid barium sulfate and aqueous sodium chloride