Will all pure ammonia always boil at the same temperature?

No, pure ammonia will not always boil at the same temperature due to variations in pressure. The boiling point of ammonia is approximately -33.34 °C at standard atmospheric pressure. However, if the pressure changes, the boiling point will also change; higher pressures raise the boiling point, while lower pressures decrease it. Therefore, the boiling temperature of ammonia is dependent on the surrounding pressure conditions.