Acontainer holds 7.5 liters of co2 at stp, how many moles of gas is this ?

- There are 0.337 moles of the gas.

Solution:- Volume(V) of carbon dioxide gas = 7.5 L

Conditions are STP means, T = 273 K and P = 1 atm

From ideal gas law equation, PV = nRT

n = PV/RT

Where n is the number of moles and R is the universal gas constant and it's value is 0.0821 atm.L/mol.K

Let's plug in the values in the formula..

n = (1 x 7.5)/(0.0821 x 271)

n = 0.337 mol

108

explanation:

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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.