What Energy Must Be Added or Given Off in a Reaction

question 3

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) 20.7 MeV added
• B) 20.7 MeV given off
• C) 28.3 MeV given off
• D) 28.3 MeV added

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Definitions:

Binomial Probability Distribution

A probability distribution that summarizes the likelihood that a variable will take one of two independent values under a given set of parameters or conditions.

Binomial Problem

A statistical question or experiment that has exactly two possible outcomes, 'success' or 'failure', and where the probability of success is the same each time the experiment is conducted.

Standard Deviation

Standard deviation is a measure of the amount of variation or dispersion in a set of values, indicating how much the values in a dataset deviate from the mean.

Standard Deviation

A measure of the amount of variation or dispersion of a set of values, indicating how much the values in a data set vary from the mean.