Mega Chem Quiz Review

If a chemical reaction produces a compound that will not dissolve in water, the reaction is a 

• acid-base reaction
• neutralization reaction
• precipitation reaction
• double displacement reaction

If you neutralize an acid with a base what will be produced?

• Sugar and water
• Sugar and salt
• Salt and water
• Water

What type of reaction is the following equation?
HCl + NH₃ -->
 Cl^- + NH₄⁺

• acid-base reaction
• neutralization reaction
• precipitation reaction
• single replacement reaction

Which of the following is an exothermic reaction.

• H2O(s)  _-----> H2O(g)
• CO2(s) _-----> CO2(l)
• H2S(g)  -----> H2S(l)
• NH2(l)  -----> NH3(g)

2.  Suppose you burn a bowl of a solid that has an Enthalpy of 1.98 kJ/kg and the products have an Enthalpy of 3.14 kJ/kg. Calculate ΔH and determine if the reaction is endothermic or exothermic.

• ΔH is -1.16 kJ/kg, endothermic
• ΔH is -1.16 kJ/kg, exothermic
• ΔH is 1.16 kJ/kg, endothermic
• ΔH is 1.16 kJ/kg, exothermic

Calculate ΔH  if the Enthalpy of the products is 54.8 kJ/kg and the Enthalpy of the reactants is 34.17 kJ/kg.

• 34.17 kJ/kg
• 54.8 kJ/kg
• 20.63 kJ/kg
• -20.63 kJ/kg

2.  Given  the  reaction 
  Cl(g) + Cl(g) ---> Cl2(g) + energy
 Which statement best describes the reaction?

• A bond is formed and energy is absorbed
• A bond is formed and energy is released
• A bond is broken and energy is absorbed
• A bond is broken and energy is released

2.  If it takes 134 J or energy to heat up 8 grams of metal from 21⁰C to 29⁰C, what is the specific heat of that metal?

• 2.09 J/g⁰C
• 8.00 J/g⁰C
• 21.0 J/g⁰C
• 6.40 J/g⁰C

If an element releases two protons and two neutrons, it is undergoing 

• Alpha decay
• Beta decay
• Gamma decay
• Omega decay

If an element undergoes beta decay, a neutron is broken and a ________ is released.

• proton
• electron
• neutron
• gamma particle