Question

Calculate the change in internal energy when 2 moles of CO are converted to 2 moles of CO2​ at 1 atm and 25∘C : 2CO(g)+O2​( g)→2CO2​( g)ΔH=−566.0 kJ/mole

Answer 1

The change in internal energy when 2 moles of CO are converted to 2 moles of CO2 is -283.0 kJ/mol.

Step-by-step explanation:

The change in internal energy when 2 moles of CO are converted to 2 moles of CO2 can be calculated using the enthalpy change of the reaction, which is -566.0 kJ/mole. Since the reaction equation is for 2 moles of CO, we need to divide the enthalpy change by 2 to find the change in internal energy per mole of CO. Therefore, the change in internal energy per mole of CO is -283.0 kJ/mol.

Answer 2

The change in internal energy when 2 moles of CO are converted to 2 moles of CO₂​ at 1 atm and 25 °C is -566.0 kJ

How to calculate the change in the internal energy?

We'll begin by calculating the work done. This is shown below:

Equation:
`2CO(g)\ +\ O_2(g)\ \rightarrow\ 2CO_(2)\ \Delta H = -566.0\ kJ/mole`

• Mole of CO converted = 2 moles
• Mole of CO₂ produced = 2 moles
• Pressure (P) = 1 atm
• Work done (W) = ?

From the above, we can see that the moles converted is the same. Thus, the change in volume, ΔV is zero. Therefore, we have

W = -PΔV

= -1 × 0

= 0 J

Now, we shall calculate the change in internal energy. Details below

• Heat released (Q) = -566.0 KJ
• Work done (W) = 0 J = 0 KJ
• Change in Internal energy (ΔU) =?

ΔU = Q + W

= -566.0 + 0

= -566.0 KJ