Due to energy being a reactant instead of a product, the process is endothermic. The system must absorb a quantity of energy before it can react, so it must be an endothermic system.
        
             
        
        
        
Answer:
The volume of air at where the pressure and temperature are  52 kPa, -5.0 ºC is 
.
Explanation:
The combined gas equation is,

where,
 = initial pressure of gas = 104 kPa
 = final pressure of gas = 52 kPa
 = initial volume of gas = 
 = final volume of gas = ?
 = initial temperature of gas = 
 = final temperature of gas = 
Now put all the given values in the above equation, we get:


The volume of air at where the pressure and temperature are  52 kPa, -5.0 ºC is 
.
 
        
             
        
        
        
Explanation:
The partial pressure of an individual gas is equal to the total pressure of the mixture multiplied by the mole fraction of the gas.
Total pressure = 2atm
Mole Fraction = number of moles / total number of moles 
Neon
Mole Fraction = 4.46 / 7.35 = 0.607
Partial Pressure = 0.607 * 2 = 1.214 atm
Argon
Mole Fraction = 0.74 / 7.35 = 0.101
Partial Pressure = 0.101 * 2 = 0.202 atm
Xenon
Mole Fraction = 2.15 / 7.35 = 0.293
Partial Pressure = 0.293 * 2 = 0.586 atm
 
        
             
        
        
        
Explanation:
As the charge of all electrons are equal, the repulsive force exerted by each of them is also going to be equal. So, as K has more electrons repulsing its valence electron than Na, it has greater electron shielding.