3. Refer to the thermochemical equation and fill in the blanks to complete the sentence below. H₂ (g) + F2 (g) → 2 HF (g) AH°-537 kJ ■ Based on the sign of the enthalpy change (AH), this reaction heat energy and therefore can be termed as (absorbs/releases) (exothermic / endothermic)

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3. Refer to the thermochemical equation and fill in the blanks to complete the sentence below.
H₂ (g) + F2 (g) → 2 HF (g)
AH°-537 kJ
■
Based on the sign of the enthalpy change (AH), this reaction
heat energy and therefore can be termed as
4. Consider the thermochemical reaction given below:
(absorbs/releases)
(exothermic/ endothermic)
AH-2486 kJ
2 C6H6 (1) + 15 O2 (g) -> 12 CO2 (g) + 6 H₂O (g)
Note: Molar masses are, C6H6 = 78.11 g/mol; O2 = 32.00 g/mol; CO2 = 44.01 g/mol; H₂O = 18.01 g/mol
Cole - 78:11 pm94;07-37
A) How many kJ of heat energy are released if 35.0 g of C6H6 is reacted in excess oxygen gas?
Show work for each step. Include units and observe proper sig figs and rounding in your answer.
2
Transcribed Image Text:3. Refer to the thermochemical equation and fill in the blanks to complete the sentence below. H₂ (g) + F2 (g) → 2 HF (g) AH°-537 kJ ■ Based on the sign of the enthalpy change (AH), this reaction heat energy and therefore can be termed as 4. Consider the thermochemical reaction given below: (absorbs/releases) (exothermic/ endothermic) AH-2486 kJ 2 C6H6 (1) + 15 O2 (g) -> 12 CO2 (g) + 6 H₂O (g) Note: Molar masses are, C6H6 = 78.11 g/mol; O2 = 32.00 g/mol; CO2 = 44.01 g/mol; H₂O = 18.01 g/mol Cole - 78:11 pm94;07-37 A) How many kJ of heat energy are released if 35.0 g of C6H6 is reacted in excess oxygen gas? Show work for each step. Include units and observe proper sig figs and rounding in your answer. 2
B) How many grams of CO2 will be produced if this reaction generated -146.8 kJ of heat energy?
Show work for each step. Include units and observe proper sig figs and rounding in your answer.
I
Transcribed Image Text:B) How many grams of CO2 will be produced if this reaction generated -146.8 kJ of heat energy? Show work for each step. Include units and observe proper sig figs and rounding in your answer. I
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