Is using God's name in vain an example of sin?

Answer 1

Using God's name in vain is surely a sin, but all sins are the same. There is really no "mortal sin". The Bible tells us that all sin is equal. Sin is sin.

Yes, using God's Name in vain is usually a mortal sin as it conscious defamation or disrespect of God's Person. Sometimes it may be a venial sin, especially if one has a habit, or if one makes an exclamation out of extreme fear or distress and thus without full consent of the will or understanding of the intellect. Intent defines the seriousness of the offense.