Pressure Conversion and Significant Figures

This video tutorial explains how to use conversion factors to change pressure units. It covers the equivalence of different pressure units like kPa, Torr, and atm, and demonstrates setting up conversion fractions. The video provides step-by-step instructions for converting between kPa, atm, and Torr, emphasizing the importance of significant figures and rounding in calculations.

What is the primary purpose of using conversion factors in pressure calculations?

• To reduce the number of significant figures

• To simplify complex equations

• To change units from one type to another

• To increase the accuracy of measurements

Which of the following is equivalent to 101.3 kPa?

• 760 Torr

• All of the above

• 1 atm

• 760 mmHg

What is the first step in setting up a conversion fraction?

• Round the result to the nearest whole number

• Divide the required value by the given value

• Multiply the given value by the conversion factor

• Identify the given and required units

How do you convert 420 kPa to atm using conversion factors?

• Multiply by 1 and divide by 101.3

• Multiply by 101.3 and divide by 1

• Multiply by 101.3 and divide by 760

• Multiply by 760 and divide by 101.3

When converting atm to Torr, what is the conversion factor used?

• 1 atm = 760 Torr

• 1 atm = 760 mmHg

• 1 atm = 1 kPa

• 1 atm = 101.3 kPa

What is the result of converting 9.20 atm to Torr?

• 9920 Torr

• 6990 Torr

• 7600 Torr

• 9200 Torr

Why is it important to consider significant figures in conversion calculations?

• To avoid using conversion factors

• To increase the number of decimal places

• To make the calculation easier

• To ensure the result is as precise as the given data

What is the final result of converting 560 Torr to kPa?

• 56.0 kPa

• 101.3 kPa

• 760 kPa

• 74.6 kPa

In the final conversion example, why is the number rounded down?

• To increase accuracy

• To simplify the calculation

• To match the number of significant figures

• Because the fourth digit is less than 5

What is the significance of the number 101.3 in pressure conversions?

• It is the conversion factor for mmHg to kPa

• It is the conversion factor for atm to Torr

• It is the conversion factor for kPa to atm

• It is the conversion factor for Torr to atm