How Many KJ of Heat Are Released When 15

question 124

Multiple Choice

How many kJ of heat are released when 15.75 g of Ba (s) reacts completely with oxygen gas to form BaO (s) ? ΔH° = -1107 kJ.

• A)63.5 kJ
• B)20.8 kJ
• C)114 kJ
• D)70.3 kJ
• E)35.1 kJ

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Definitions:

Calcium Ions

Positively charged calcium atoms that are crucial for many physiological processes including muscle contraction, nerve function, and blood clotting.

Troponin-Tropomyosin Complex

A protein complex involved in the regulation of muscle contraction in skeletal and heart muscles.

Sarcoplasmic Reticulum

A specialized type of smooth endoplasmic reticulum found in muscle cells, involved in the storage and release of calcium ions for muscle contraction.

Power Stroke

The phase in the cycle of a motor protein, such as myosin in muscle contraction, where force is generated and movement occurs.