A sample of chlorine gas has a pressure of 7.25 kPa at 20.0°C. What will its pressure be at 60.0°C if its volume remains constant?
A. 2.42 kPa
B. 8.24 kPa
C. 21.8 kPa
D. 6.38 kPa

Question

A sample of chlorine gas has a pressure of 7.25 kPa at 20.0°C. What will its pressure be at 60.0°C if its volume remains constant?
  A. 2.42 kPa 	
  B. 8.24 kPa 	
  C. 21.8 kPa 	
  D. 6.38 kPa

anonymous · Answer

@JFraser  i think its (C)

jfraser · Answer

it's not C.

jfraser · Answer

set up the equation first, without numbers, then do the math one step at a time

somy · Answer

P1V1/T1=P2V2/T2 
so if volume is constant then we can ignore it
thus 
P1/T1=P2/V2
and so now solve it

jfraser · Answer

$$\frac{P_1}{T_1} = \frac{P_2}{T_2}$$so$$P_2  = \frac{P_1*T_2}{T_1}$$

jfraser · Answer

and convert the temp to kelvin, always

somy · Answer

btw if you take pressure as Kpa then the answer of the second pressure will be in Kpa

anonymous · Answer

i think i did it wrong.. i got (B)

somy · Answer

bingoo!

jfraser · Answer

it's B