Gay-Lussacs law states that pressure of a gas is directly proportional to temperature when the volume is kept constant
P / T = k
where P - pressure , T - temperature in kelvin and k - constant
\(\frac{P1}{T1} = \frac{P2}{T2}\)
where parameters for the first instance are on the left side of the equation and parameters for the second instance are on the right side of the equation
T1 - 25 °C + 273 = 298 K
substituting the values in the equation
\(\frac{0.96 atm}{298 K}= \frac{1.25 atm}{T2}\)
T2 = 388 K
temperature in celcius - 388 K - 273 = 115 °C
answer is C. 115 °C
