I'm trying to get my head around a chemical engineering problem and was hoping someone could advise me on how to solve it.

I have a closed soft drink bottled at 5g/L of CO2 with known temperature, headspace pressure, headspace volume and liquid volume. I want to work out the maximum pressure that would be exerted on the cap from the headspace if the bottle was heated to 70°C. I'm not sure what the best way to approach this is, 1) should I determine the volume reduction in the headspace from the liquid expansion and then work out how this changes the headspace pressure from an EoS? 2) Would I then also need to work out any further pressure increase from CO2 dropping out of solution and trying to reach equilibrium or would this not contribute to the headspace pressure, rather the headspace pressure determines how much of the CO2 is dissolved within the liquid?

Any help is greatly appreciated.

Best regards,

chin18