Multiple Choice
For the balanced chemical equation: 2C2H6(g) + 7O2(g) → 4CO2(g) + 6H2O(g), what is the standard enthalpy change (ΔH°) for the reaction using the standard heats of formation?
3. Chemical Reactions
Balancing Chemical Equations
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Join thousands of students who trust us to help them ace their exams!Watch the first videoMultiple Choice
What is the balanced chemical equation for the reaction: Li + CO2 + H2O -> LiHCO3 + H2?
A
2 Li + 2 CO2 + 2 H2O -> 2 LiHCO3 + H2
B
2 Li + CO2 + 2 H2O -> 2 LiHCO3 + H2
C
2 Li + 2 CO2 + 2 H2O -> 2 LiHCO3 + 2 H2
D
2 Li + 2 CO2 + 2 H2O -> 2 LiHCO3 + H2
Verified step by step guidance1
Identify the reactants and products in the chemical equation: Reactants are Li, CO2, and H2O; products are LiHCO3 and H2.
Write the unbalanced chemical equation: Li + CO2 + H2O -> LiHCO3 + H2.
Count the number of each type of atom on both sides of the equation to determine which elements need balancing.
Balance the equation by adjusting coefficients to ensure the same number of each type of atom on both sides. Start by balancing the lithium (Li) atoms, then carbon (C), hydrogen (H), and finally oxygen (O).
Verify that the balanced equation has the same number of each type of atom on both sides. The balanced equation should be: 2 Li + 2 CO2 + 2 H2O -> 2 LiHCO3 + H2.
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