Question

An automobile tire is inflated to a pressure of 31.2 psi. Express this pressure in atmospheres, kilopascals, inches Hg, millimeters Hg and torr.

Hint: 1 atm = 101.3 kPa = 29.92 in Hg = 760 mm Hg = 14.69 psi = 760 torr

psi	atm	kPa	in Hg	mm Hg	torr
31.2

Answer 1

# 1 Atm = 14.69 psi then

31.2 psi = 31.2/14.69 = 2.124 atm

31.2 psi = 2.124 atm

# 1 atm = 101.3 kPa then

2.124 atm = 101.3 X 2.124 = 215.16 kPa

31.2 kPa = 215.16 kPa

# 1 atm = 29.92 in Hg then

2.124 atm = 29.92 X 2.124 = 63.55 in Hg

31.2 psi = 63.55 in Hg

# 1 atm = 760 mm Hg then

2.124 atm = 760 X 2.124 = 1614.24 mm Hg

31.2 psi = 1614.24 mm Hg

# 1 atm = 760 torr then

2.124 atm = 760 X 2.124 = 1614.24 torr

31.2 psi = 1614.24 torr

psi	atm	kPa	in Hg	mm Hg	torr
31.2	2.124	215.16	63.55	1614.24	1614.24