An insulated rigid vessel contains a mixture of fuel and

An insulated rigid vessel contains a mixture of fuel and air. The mixture is ignited by a minute spark. The contents of the vessel experience

1. Increase in temperature, pressure and energy
2. Decrease in temperature, pressure and energy
3. Increase in temperature and pressure but no change in energy
4. Increase in temperature and pressure but decrease in energy

Increase in temperature and pressure but no change in energy Temperature increases
Volume = constant; p – decreases
∆ Q = 0 (insulated)