Question

Assuming an experimental value of enthalpy of –655 kj/mol and a true value of –603, what is the percent error of the experiment? use a calculator and round to the nearest hundredth as well as the absolute value of the percentage. %

Answer 1

8.62%

8.62% is the percent error of the experiment.

Rounding to the nearest hundredth value will be 8.620.

Determine the difference between the figures provided and divide by the actual value to find the percent error.

(-655 - -603)/(-603) = 0.0862

Multiply by 100%,

(0.0862) x 100% = 8.62%

What is percent error?

The percent error is the difference between the estimated value and the actual value in relation to the actual value.

What does percent error enable us to establish?

• Error margins are easily understood when expressed as a percentage. It reveals the size of the inaccuracy.
• A 3-percent error value, for example, indicates that your measured number is quite near to the true amount.
• A 50% margin, however, indicates that your measurement is far from the true number.

The significance of percentage error

• When you measure something in an experiment, the percentage of mistakes indicates the size of your errors.
• Greater proximity to the accepted or genuine value is indicated by smaller values.

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