Two closed vessels of same volume are joined through a narrow tube and both vessels are filled with air of pressure \( 90 \, \text{kPa} \) and temperature \( 400 \, \text{K} \). Keeping the temperature of one vessel constant at \( 400 \, \text{K} \) the second vessel temperature is raised to \( 500 \, \text{K} \). The final pressure in the vessels is _____ \( \text{kPa} \).
