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When an electrical spark is applied to sodium azide (NaN3) in an automobile air bag, the NaN3 is rapidly converted into elemental sodium and nitrogen gas. What type of reaction is this?

The value of ∆Hº for the reaction below is -790 kJ:       2 S (s) + 3 O2 (g)

Which atomic orbitals are represented by the electron density plots pictured below?

The temperature of a 15 g sample of lead metal increases from 22 ºC to 37 ºC upon the addition of 29.0 J of heat. What is the specific heat of lead (in J/g-K)?

Which process below is endothermic?

Which of the following is classified as a decomposition reaction?

What volume (in mL) of a 0.827 M KOH solution is required to neutralize 35.00 mL of 0.737 M H2SO4? (Hint: You’ll want to start by writing a balanced equation for the process)

If a particular process occurs at constant pressure and there is no change in enthalpy (∆H=0), what can you conclude about ∆E, q, and w?

For which of the following reactions is the value of ∆Hºrxn equal to ∆Hºf for the product?

How much work (in kJ) is done during a reaction in which the internal volume expands from 23.0 L to 58.0 L against an outside pressure of 3.50 atm?