Which of the following is an example of objects in thermal equilibrium?

One that has a constant temperature, that's even throughout the entire object. You didn't list down the choices, but whatever that fits this criteria is the correct answer. Maybe, if you comment down the choices; I'll tell you the correct ones.

Temperature plays a big part in alcohol

Heat is involved in chemical change in two ways; chemical changes either result in heat being added to or removed from an object, and chemical changes require a certain amount of heat before they can take place.

We first assume that this gas is an ideal gas where it follows the ideal gas equation. the said equation is expressed as: pv = nrt. from this equation, we can predict the changes in the pressure, volume and temperature. if the volume and the temperature of this gas is doubled, then the pressure still stays the same.