Is boiling water a physical change

Phosphoric acid is a polyprotic acid. Write balanced chemical equations for the sequence of reactions that phosphoric acid can undergo when it's dissolved in water. True or false?

53 Explain, in terms of electrons, why the radius of a potassium atom is larger than the radius of a potassium ion in the ground state.

Compared to maximum number of electrons that can occupy the d sublevel the max number of electrons that can occupy s sublevel

Why does changing the volume of a container change the pressure of the gas in it? A: Changing the volume reduces the number of molecules so they hit the walls of the container less often.

What object transforms electrical energy into chemical energy? Group of answer choices An electric fan A television A battery operated remote controlled car A battery charger for rechargeable batteries

Find δe for the change in state of 1.0 molh2o (l) at 79 ∘c to h2o (g) at 116 ∘c. the heat capacity of h2o (l) = 75.3 j/molk, heat capacity of h2o (g) = 25.0 j/molk, and the heat of vaporization of h2o is 40.7*103j/mol at 100 ∘c.

Balloon A started with a volume of 1.76 L. The temperature of the room the balloon was in was 295 K. The balloon was heated to a temperature of 253.15 K. What is the new volume?

The standard internal energy change for a reaction can be symbolized as ΔU°rxn or ΔE°rxn. For the following reaction equations, calculate the energy change of the reaction at 25 °C and 1.00 bar. Sn (s) + Cl2 (g) - - - > SnCl4 (l) + H (KJmol) - 511.3.

You transfer a sample of a gas at 17°C from a volume of 5.67 L and 1.10 atm to a container at 37°C that has a pressure of 1.10 atm. What is the new volume of the gas?

What is true about the energy involved in a chemical reaction? A. The amount of energy is constant, but it is converted from one form to another. B. The amount of energy decreases as it is converted from one form to another. C.