Explain why lattice energy is a negative quantity.

When a bond breaks, what is happening with the energy? A B Energy may be released or absorbed depending on the circumstances с Energy is neither released nor absorbed because energy can neither be created nor destroyed D Energy is released to the surroundings Energy is absorbed from the surroundings

What is the heat of formation (in kJ/mol) for PbS. 2 PbS (s) + 3 O₂ (g) → 2 SO₂ (g) + 2 PbO (s) ∆H° = -828.4 kJ/mol

Which of the following reactions is associated with the lattice enthalpy (ΔlattHº) of BaCl2. Select one: BaCl2(s) → Ba(s) + Cl2(g) Ba2+(aq) + 2Cl-(aq) → BaCl2(s) Ba(s) + Cl2(g) → BaCl2(s) BaCl2(s) → Ba2+(aq) + 2Cl-(aq) Ba2+(g) + 2Cl-(g) → BaCl2(s)

6. Explain the direction in which heat energy will flow in the picture shown to the left.

Explain, with the help of a suitable graph, why it takes more energy to heat a constant volume of hydrogen gas (H₂) from 10,000 K to 10,100 K, than to heat the same volume of gas from 0 K to 100 K

Which diagram shows the change in potential energy as two atoms approach each other and why does the potential energy change in the way shown? 2. to 1. PE PE PE r because 4. The atoms are moving toward each other against the repulsive force that exists between them. 5. The atoms are moving toward each other with the attractive force that exists between them. 6. The atoms initially attract each other, but repel upon becoming too close together. O 1 and 4 O 2 and 6 O 3 and 5 O 2 and 4 O 3 and 4 3.

As we all know that microwave oven while warming up the sample by providing enough energy to rotate the water molecules present in the sample. Can the change in the internal energy of a cup of water heated in a microwave oven be described as a state function? Can the heat produced be described as a state function?

5. Explain the direction in which heat energy will flow in the picture shown to the left.

Which statement is incorrect? Energy is the capacity to do work or to transfer heat. Kinetic energy is the energy of motion O Aprocess that absorbs energy from its surroundings is called exothermic. The Law of Conservation of Energy is another statement of the First Law of Thermodynamics