Air at atmospheric pressure and room temperature is confined in an insulated container by a frictionless piston of negligible weight. By putting masses on the top of the piston, the air can be compressed. A mass of $1.0\,\text{kg}$ is placed on the piston and the volume of the trapped air falls from $100\,\text{cm}^3$ to $90\,\text{cm}^3$. Which statement is correct?
- AAdding another $1.0\,\text{kg}$ mass decreases the volume of the air by less than $10\,\text{cm}^3$.
- BAdding an additional $9.0\,\text{kg}$ mass reduces the volume of the air to zero.
- CThe pressure of the trapped air is less than atmospheric pressure when its volume is $90\,\text{cm}^3$.
- DThe temperature of the air decreases as the $1.0\,\text{kg}$ mass is added.