CHEM 1 A 5/3

Enthalpy Stoichiometry

CHEM 1A

Warm Up (11:45-12:00)

Multiple Select

• When working with enthalpy stoichiometry, what are the conversion factors?

• (select all that apply)

• Molar Mass

• Grams

• Moles

• Lewis Structure

Multiple Choice

Find the standard enthalpy for this reaction: CH4 (g) + 2 O2 (g) → CO2 (g) + 2H2O (g)

• −802.3 kJ/mol

• 802.3 kJ/mol

• 802300 J/mol

• -234 kJ/mol

Multiple Choice

Find the standard enthalpy of C6H6 (l) → 3 C2H2  ∆H = ?

• -631.1 kJ/mol

• 802.1 kJ/mol

• 631.1 kJ/mol

• 245kJ/mol

Session (12:00-12:40)

01

Closing

(12:40-12:50)

Poll

CH4 (g) + 2 O2 (g) → CO2 (g) + 2H2O (g) °H = -802 kJ/mol

In the following reaction, how much heat (in kJ) was released when 4.97 moles of CH4 are burned?

1. Balance

2. 2. Find standard Enthalpy

3. 3. Enthalpy Stoichiometry

• Easy

• Okay

• Not Sure

• I don't Know What Am I Doing

Poll

1204 kJ of heat energy was released when magnesium metal combined with oxygen. Find the amount of heat transferred when 2.40 g of magnesium reacts.

• Easy

• Okay

• Not Sure

• I don't Know What Am I Doing

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__CH4 (g) + _ O2 (g) → _CO2 (g) + __H2O (g) °H = -802 kJ/mol

In the following reaction, how much heat (in kJ) was released when 4.97 moles of CH4 are burned?