Consider the following reaction in the vessel with a movable piston. X (g) + Y (g) → Z (s) For this reaction, ΔU = 286 J, the piston moves up, and the system absorbs 388 J of heat from its surroundings. (a) Does the system do work? (b) How much work?

Scientists say that it is impossible to reach a temperature of zero kelvin, because the atoms will stop moving, and the volume of the substance will become zero, But we have reached the pico kelvin temperature, which is almost zero, and there is no difference between it and zero, so why do they say it is impossible? and The laws of physics still work at picokelvin.

The atmospheric pressure in Ogden, Utah is 646 mm Hg. The boiling point of water here will be a. less than 100 C b. 100 C c. more than 100 C

If you want to cook in water at ${150}^{\circ }C$, you need a pressure cooker that can with stand necessary pressure. a) What pressure is required for ht boiling point of water to be this high? b) If the lid of the pressure cooker is a disk 25.0 cm in diameter, what force must it be able to withstand, at this pressure?

What thermodynamic properties are extensive?

For a chemical reaction, it is well-known that
$\mathrm{\Delta }H=H_{\text{products}}-H_{\text{reactants}}$
Are we physically unable to determine an absolute H?

Why is free energy “free” ?

One mole of solute particles raises the boiling point of 1.00 kilogram of water by 0.51 C. Calculate the boiling point elevation when 0.300 moles of CaBr2 is dissolved in 500 g of water?