Calcular la presión a la que se encontraba sometido un gas que se encontraba a 290 K si luego de bajarle la temperatura hasta 280 K su presión tomó un valor de 2 atm

Calculate the pressure to which a gas that was at 290 K was subjected if after lowering the temperature to 280 K its pressure took a value of 2 atm

Gay Lussac's Law  

When the volume is not changed, the gas pressure is proportional to its absolute temperature  

T₁=290 K

T₂=280 K

P₂=2 atm

So the initial pressure(before lowering temperature)=2.071 atm