Answer:
0 joules
Step-by-step explanation:
To calculate the internal energy of a substance, you need to know the substance's specific heat capacity and mass, as well as the temperature change it undergoes.
The internal energy of a substance is given by the equation:
Internal Energy = mass * specific heat capacity * temperature change
In this case, the mass of 4 moles of oxygen molecules is 32 grams (1 mole of any substance has a mass of 16 grams). The specific heat capacity of oxygen gas is 0.92 J/g*K.
To find the temperature change, you need to know the initial and final temperatures. If the initial temperature is 25 degrees Celsius, and there is no temperature change, then the final temperature is also 25 degrees Celsius. Therefore, the temperature change is 0.
Plugging these values into the equation, we get:
Internal Energy = 32 g * 0.92 J/g*K * 0 K = 0 J
So the internal energy of 4 moles of oxygen molecules at 25 degrees Celsius is 0 joules.