Final answer:
When a party balloon is squeezed to half of its initial volume with no change in temperature, the pressure inside the balloon doubles due to Boyle's Law, which states that pressure is inversely proportional to volume for an ideal gas.
Step-by-step explanation:
The question pertains to the relationship between volume and pressure of a gas when the temperature is held constant. According to Boyle's Law, the pressure of a gas is inversely proportional to its volume when temperature remains unchanged. If a party balloon is squeezed to one-half its original volume with no change in temperature, the pressure inside the balloon will double.
For example, if the initial pressure inside the balloon (P1) was 1.00 atmosphere and the balloon was squeezed to half of its initial volume (V2 = 0.5V1), the new pressure (P2) would be 2.00 atmospheres, assuming the temperature remains steady and there are no leaks. This concept is a fundamental principle in the study of ideal gases.