The temperature off 200.0 mL of a gas originally at STP is changed to -25 degrees at a constant volume. What’s the pressure of gas in atm?

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Answer 1 · 2018-03-29T01:00:18

#P_2# #=# #0.90846# #atm#

Givens:

#P_1 = 1# #atm#

#T_1 = 273.15# #K#

#P_2 =?#

#T_2 = -25°C+273.15# #K= 248.15# #K#

Use Gay Lussac's Law for pressure and temperature when the volume is constant.

#P_1/T_1# #=# #P_2/T_2#

#"1atm"/"273.15K"# #=# #P_2/"248.15K"#

#0.0036609...# #=# #P_2/"248.15K"#

#0.0036609...# x #248.15# #K# #=# #P_2#

#P_2# #=# #0.90846# #atm#