the volume of 350mL of gas at 25degrees celsius is decreased to 125mL at constant pressure. what is the final temperature of the gas?-167, or -126, or 70, or 89, or 147
2007-06-08 04:30:42 · 3 answers · asked by mommy Ty 3 in Science & Mathematics ➔ Chemistry
P/T = P`/ T´
Use Kelvin scale of temperatures ( ºC +273 ).
2007-06-08 04:39:51 · answer #1 · answered by Anonymous · 1⤊ 1⤋
This is an extension of the Ideal Gas Law, PV = nRT
In the system you describe, P and n are constant, so the only things that can change are V and T. This leads us to Charles Law:
V = kT, or another version thereof:
V1/T1 = V2/T2
So, you know V1 = 350 ml, V2 = 125 ml, and T1 = 25°C (= 298K)
T2 = (V2*T1)/V1
T2 = (125 ml * 298K)/(350ml) = 106.4K = -167°C.
2007-06-08 04:41:53 · answer #2 · answered by Dave_Stark 7 · 1⤊ 0⤋
V1/T1 = V2/T2 Charles Law
V1 = 0.350 L
T1 = 25ºC + 273 K = 298 K
V2 = 0.125 L
T2 = ?
T2 = V2T1/V1 = (0.125 L) (298 K) / (0.350 L)
= 106.43 K (-273) = -167ºC
2007-06-08 04:39:10 · answer #3 · answered by Dr Dave P 7 · 1⤊ 0⤋