Question

PLEASE HELP!!! A dive tank at 3000 psi has a temperature of 30° C on the boat. What would the pressure be when diving in 14° C water? Assume the volume and number of particles stayed the same.

Answer 1

The pressure would be 2841.59 psi

Further explanation

Gay Lussac's Law  

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

$\tt \dfrac{P_1}{T_1}=\dfrac{P_2}{T_2}$

P₁=3000 psi

T₁ = 30+273=303 K

T₂=14+273=287 K

$\tt P_2=\dfrac{P_1.T_2}{T_1}\\\\P_2=\dfrac{3000\times 287}{303}\\\\P_2=2841.59~psi$