PT는 일정. 90 kPa 200 kPa 220 kPa tire 0.035 m3 percent. T2 계산

PT는 일정. 90 kPa 200 kPa 220 kPa tire 0.035 m3 percent. T2 계산

 

 

The gage pressure of an automobile tire

is measured to be 200 kPa before a trip

and 220 kPa after the trip at a location

where the atmospheric pressure is 90 kPa.

Assuming the volume of the tire remains constant at 0.035 m3,

determine the percent increase

in the absolute temperature of the air in the tire.

 

 

절대압력 = 대기압력 + 계기압력

( 참고 https://ywpop.tistory.com/6964 )

 

 

 

> P1 = 90 + 200 = 290 kPa

> P2 = 90 + 220 = 310 kPa

 

여행 전 온도 = 25℃ 라고 가정하면,

> T1 = 273 + 25 = 298 K

> T2 = ? K

 

 

 

P1 / T1 = P2 / T2

( 참고 https://ywpop.tistory.com/7091 )

 

T2 = P2 / (P1 / T1)

= 310 / (290 / 298)

= 318.55 K

 

 

 

(318.55 – 298) / 298 × 100 = 6.9%

( 참고 https://ywpop.tistory.com/11975 )

 

 

 

답: 6.9%

 

 

 

 

[키워드] 몇 퍼센트 증가 기준