Answer:
23 Pa
Step-by-step explanation:
According to ideal gas law, PV = nRT. If V is constant, then:
P/T = P/T
Remember that P and T are absolute. So °F must be converted to either Rankine or Kelvin.
To convert °F to Rankine, add 459.67.
30°F + 459.67 = 489.67 R
80°F + 459.67 = 539.67 R
21 Pa / 489.67 R = P / 539.67 R
P = 23.1 Pa
Rounded to two significant figures, the pressure is 23 Pa.
