Solutions for Radiactivity Questions
Here are some questions related to Radioactivity with their solutions: Question 1: 8.5J heat flows out into the Surroundings when a sample of a gas contracts 400 mL by an average pressure of 0.5 atm. Calculate the change in energy of the system. Solution : Here, has positive sign. It means energy of the system increases. Questions 2: 10 moles of oxygen is kept in 5.0 L cylinder at 313 K. Due to sudden leakage through a hole, all the gas escapes into the...
read moreWorksheet on pH and pOH values of solutions
The measure of acidity or basicity of an aqueous solution is called pH. Aqueous solution with pH value less than 7 are called acid and solutions having pH value greater than 7 are called basic. The measurement of pH value is very important in the field of medicine, biology, chemistry etc. pOH is used to describe the concentration of hydrogen ion. pOH is derived from pH value rather than measuring it independently. Here, you can find some question related to “pH and pOH” and its answers: Questions: 1. At , the pH value of solution...
read moreThermochemistry Worksheet
The study of energy and heat with respect to chemical reaction and physical transformation is called Thermochemistry. Every chemical reaction either release or absorb energy and phase may change, such as in melting and boiling. Thermochemistry plays a vital role in predicting reactant and product quantities. Here, you can find some questions related to “Thermochemistry” and its answer: Questions: 1. An adiabatic expansion of an ideal gas always has: (a) q = 0 (b) w = 0 (c) (d) Decrease in temperature 2....
read moreWorksheet on Enthalpies of reaction
Enthalpies of reaction is also called as energy change of a reaction.It is the amount of heat absorbed in reaction. Enthalpy of reaction depends on the state of reactants and products. Here you can find questions related to ” Enthalpies of Reaction” and their answers: Questions: 1. Heat of transition is the heat evolved or absorbed when a substance is converted from: (a) One allotropic form to another allotropic (b) Liquid to vapour (c) Solid to vapour (d) Solid to liquid 2. The heat absorbed in a...
read moreThermodynamics Worksheet
Thermodynamics is a subject that deals with various accepts related to heat transformation, work done, radiation and effect on material bodies. It shows how the system changes when they interact with each other or with their surroundings. The first definition of thermodynamics was introduced by Scottish physicist Lord Kelvin in 1854. Thermodynamics can be applied on various fields like Science and engineering. There are four laws of thermodynamics. Here, you can find some questions related to “Thermodynamics” and their...
read moreWorksheet on Endothermic & Exothermic reaction
Reaction releasing energy in the form of heat, light, electricity and sound is called Exothermic reaction. Example of Exothermic reaction is mixing of water with strong acid. The opposite of exothermic reaction is Endothermic reaction and it absorbs energy in the form of heat from the surrounding. Here you can find some question based on “Exothermic and Endothermic reaction” and their answers: Questions: 1. Which of the following reactions is endothermic? (a) (b) (c) (d) 2. All reactions with...
read moreWorksheet on Spontaneous process
A process that occurs in a system without giving any input of energy from the surrounding is called spontaneous process. It is also called as irreversible process and in order to reverse the process input of external energy is needed. This is a process that occurs on it’s own. In this article you can find some question related to ” Spontaneous process” and their answers: Questions: 1. A spontaneous change is one in which the system suffers: (a) An increase in internal energy (b) A lowering of free energy (c) ...
read moreWorksheet on Gibb’s Free Energy
A thermodynamic potential that measures the process-initiating work obtained from a thermodynamic system at a constant pressure and temperature is called Gibbs Free Energy. Orginally Gibbs Free Energy is called Available energy. Gibbs free energy was developed by Josiah Willard Gibbs in 1870s. Josiah Willard Gibbs was a American mathematician. In this article you can find some questions related to “Gibbs Free Energy” and their answers: Questions: 1. For a spontaneous chemical process, the free energy change is: (a) ...
read moreWorksheet based on Law of Thermodynamics
The Law of thermodynamics are used to define fundamental physical quantities like energy, entropy and temperature, in order to describe thermodynamic system. It also describes the transformation of energy in the form of heat and work. There are Four laws of thermodynamics, which are listed below: 1. Zeroth law of Thermodynamics 2. First law of Thermodynamics 3. Second law of Thermodynamics 4. Third law of Thermodynamics Here you can find some question based on “Law of thermodynamics” and their answers: Questions: 1. When two...
read moreBond Energy Worksheet
Bond energy is used to describe the strenght of a bond in a chemical bond. In simple word it is a heat which is required in-order to break one Mole of a molecule into a individual atom. Bond strenght is directly related to bond lenght and bond distance. In this article you can find questions related to “Bond Energy” and their answers: Questions: 1. Which one of the following bonds h the highest average bond energy (kcal / mole)? (a) S = O (b) C = C (c) (d) 2. One mole of methanol, when burnt in oxygen...
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