# 7.1.1: Practice Problems- Temperature and Pressure

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PROBLEM \(\PageIndex{1}\)

Convert the boiling temperature of gold, 2966 °C, into degrees Fahrenheit and kelvin.

**Answer**-
5371 °F

3239 K

PROBLEM \(\PageIndex{2}\)

Convert the temperature of scalding water, 54 °C, into degrees Fahrenheit and kelvin.

**Answer**-
129.2 °F

327 K

**Click here to see a video solution**-

PROBLEM \(\PageIndex{3}\)

Convert the temperature of the coldest area in a freezer, −10 °F, to degrees Celsius and kelvin.

**Answer**-
−23 °C

250 K

PROBLEM \(\PageIndex{4}\)

Convert the temperature of dry ice, −77 °C, into degrees Fahrenheit and kelvin.

**Answer**-
-106.6 °F

196 K

**Click here to see a video solution**-

PROBLEM \(\PageIndex{5}\)

Convert the boiling temperature of liquid ammonia, −28.1 °F, into degrees Celsius and kelvin.

**Answer**-
−33.4 °C

239.8 K

PROBLEM \(\PageIndex{6}\)

The label on a pressurized can of spray disinfectant warns against heating the can above 130 °F. What are the corresponding temperatures on the Celsius and kelvin temperature scales?

**Answer**-
90 °C

363 K

**Click here to see a video solution**-

PROBLEM \(\PageIndex{7}\)

The weather in Europe was unusually warm during the summer of 1995. The TV news reported temperatures as high as 45 °C. What was the temperature on the Fahrenheit scale?

**Answer**-
113 °F

PROBLEM \(\PageIndex{8}\)

Why do some small bridges have weight limits that depend on how many wheels or axles the crossing vehicle has?

**Answer**-
Pressure is defined as force per unit area. Similarly to the example in the text of the elephant and the figure skater, the more wheels or axles on the vehicle, the more area the weight is spread over, causing less pressure to be exerted on any one point on the bridge.

PROBLEM \(\PageIndex{9}\)

A typical barometric pressure in Redding, California, is about 750 mm Hg. Calculate this pressure in atm and kPa

**Answer**-
0.987 atm

99.97 kPa

PROBLEM \(\PageIndex{10}\)

A typical barometric pressure in Denver, Colorado, is 615 mm Hg. What is this pressure in atmospheres and kilopascals?

**Answer**-
0.809 atm

82.0 kPa

**Click here to see a video solution**-

PROBLEM \(\PageIndex{11}\)

Canadian tire pressure gauges are marked in units of kilopascals. What reading on such a gauge corresponds to 32 psi?

**Answer**-
2.2 × 10

^{2}kPa

PROBLEM \(\PageIndex{12}\)

During the Viking mission landings on Mars, the atmospheric pressure was determined to be on the average about 6.50 millibars (1 bar = 0.987 atm). What is that pressure in torr and kPa?

**Answer**-
4.88 torr

0.650 kPa

**Click here to see a video solution**-

PROBLEM \(\PageIndex{13}\)

The pressure of the atmosphere on the surface of the planet Venus is about 88.8 atm. Compare that pressure in psi to the normal pressure on earth at sea level in psi.

**Answer**-
Earth: 14.7 psi

Venus: 13.1 × 10

^{3}psi

PROBLEM \(\PageIndex{14}\)

Consider this scenario and answer the following questions: On a mid-August day in the northeastern United States, the following information appeared in the local newspaper: atmospheric pressure at sea level 29.97 in. Hg, 1013.9 mbar.

- What was the pressure in kPa?
- The pressure near the seacoast in the northeastern United States is usually reported near 30.0 in. Hg. During a hurricane, the pressure may fall to near 28.0 in. Hg. Calculate the drop in pressure in torr.

**Answer a**-
101.5 kPa

**Answer b**-
51 torr drop

PROBLEM \(\PageIndex{15}\)

The pressure of a sample of gas is measured at sea level is 264 mmHg. Determine the pressure of the gas in:

- torr
- Pa
- bar

**Answer a**-
264 torr

**Answer b**-
35197 Pa

**Answer c**-
0.352 bar

## Contributors

Paul Flowers (University of North Carolina - Pembroke), Klaus Theopold (University of Delaware) and Richard Langley (Stephen F. Austin State University) with contributing authors. Textbook content produced by OpenStax College is licensed under a Creative Commons Attribution License 4.0 license. Download for free at http://cnx.org/contents/85abf193-2bd...a7ac8df6@9.110).

- Adelaide Clark, Oregon Institute of Technology