A balloon contains Helium, Neon, Argon, and Krypton gases. The pressure of the balloon is 1000 kPa. The following pressures are known: PHe = 350 kPa, PNe = 220 kPa, and PAr = 70 kPa. Determine the pressure of krypton in the balloon.

360kpa

Explanation:

all those gases are noble gases.they do not react with each other.therefore the the total pressure of the balloon equals to the addition of all individual pressures of the gases.

total pressure=[ pHe+pNe+pAr+pKr]

1000kpa=[350kpa+220kpa+70kpa+pKr]

pKr=360kpa

answer: enthalpy

explanation:

for a exothermic reaction, the energy is released i.e. the energy of the products is lower than the energy of the reactants.

= enthaply

= energy of products

= energy of reactants

as , thus comes out to be negative. negative value of enthalpy shows that the reaction is exothermic.

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