When 100 G of Ethane, C₂ H₆(g), Burns in Oxygen, 519

question 32

Multiple Choice

When 10.0 g of ethane, C₂ H₆(g) , burns in oxygen, 519 kJ of heat are released. What is D H for the following thermochemical equation?
2 C₂ H₆(g) + 7 O₂(g) 4 CO₂ (g) + 6 H₂ O ( )

• A) +3.12×10³ kJ
• B) +1.56×10³ kJ
• C) - 3.12×10³ kJ
• D) - 1.56×10³ kJ
• E) none of these

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Definitions:

Hawthorne Effect

The alteration of behavior by the subjects of a study due to their awareness of being observed.

Placebo Control Group

In research, a group of participants that receives an inactive treatment or substance to compare against the effects of the actual treatment.

Therapy Outcomes

The results or consequences of therapeutic interventions, which can vary widely depending on the modality, therapist, and client characteristics.

Research Methodology

The systematic, theoretical analysis of the methods applied to a field of study, encompassing the principles behind the choice and use of particular techniques.