[NitricAcid]

I need help on this problem, anyone know how to solve it? thanks

In the thermal decomposition of compound A on vidreo: 2A (g) -> 2B (s) +3 C (l), it was found that the total system pressure varied with time at 350 ° C, according to sample in the table.

t (h)           0      16      37.66     45.6     91.2     136.8
 p (mmHg)   42.1  43.8   46.06      46.99    52.98    59.14

Calculate: order of reaction with respect to A, and the rate constant

The question I have is this: if you only count the gas pressure,

  
Why pressure increases when decreasing the concentration of the gas?

[Babcock_Hall]

It is odd that pressure is rising, not falling.  It is also odd that the data do not extend to equilibrium, from the look of things.

[curiouscat]

It is odd that pressure is rising, not falling.  It is also odd that the data do not extend to equilibrium, from the look of things.

Only thought I had was, would the vapor pressure of C be at all relevant here? What if C was a high vapor pressure liquid?

Not sure though; I'm still confused.