What Energy Must Be Added or Given Off in a Reaction

question 85

Multiple Choice

What energy must be added or given off in a reaction where two hydrogen atoms and two neutrons are combined to form a helium atom? (Atomic masses for each: hydrogen,1.007 825 u;neutron,1.008 665 u;helium,4.002 602 u;also,1 u = 931.5 MeV/c²)

• A)74.85 MeV added
• B)74.85 MeV given off
• C)28.30 MeV given off
• D)28.30 MeV added

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The general belief that a rule, institution, or leader has the right to govern or command.

Authority Figure

An individual who holds power or influence over others, often in a specific context like a workplace, educational setting, or family.

Door-In-The-Face Technique

A persuasive strategy that involves making a large request that is expected to be refused in order to increase the likelihood of compliance with a smaller request.

Late Shift

In work contexts, a shift that starts late in the day or evening and can extend into the night; in cognitive terms, a late change or shift in opinion or strategy.