SANDIP KHADKA

7: Calorie is the largest unit of energy, among the given.

8: A perfect black body has a unique characteristic feature as a good absorber and a good radiator.

9: A thermodynamic process where no heat is exchanged with the surroundings is adiabatic.

10: Nernst formulated the Third law of thermodynamics.

11: The irreversibility of a process occurs due to either a) lack of equilibrium during the process or b) involvement of dissipative effects or both.

12: Efficiency of heat engine cycle is the ratio...

1: A measure of the degree of disorder of a system is known asenthalpy.

2:If ΔThe efficiency of Carnot engine operating with reservior temperature at 100 K and –23 K will be(100+23)/100.

3:Coefficient of performance of an ideal refrigerator working between temperature T1 and T2 (T1 > T2) isBeta = T2 / (T1 - T2).

4:Entropy of a thermodynamic system does not change when this system is used for conduction of heat from a hot reservoir to a cold reservoir.

5:The second law of thermodynamics states...

1. Which of the following is correct expression of the first law of thermodynamics?

a) q=H - W

b)H=q+W

c)U= q+ W

d)U=H +PV

2.The first law of thermodynamics fails to decide____________

a) the direction of the the process

b) the extent of conversion of one form of energy to another

c) both these

d) none of these

4.The first law of thermodynamics is also known as,

a) law of mass action

b) law of conservation of mass

c) law of conservation of energy

d) law of conservation of mass and energy

5. Heat cannot by...

1. The variations in enthalpy that can not be detected per calorimeter can be detected with the aid of

1. Newton’s law


2. Hess’s law


3. Krebs law


4. Ohm’s law

2. The energy required to sever a given covalent bond is named

1. bond energy


2. bond enthalpy


3. bond dissociation energy


4. all of above

3. Changes in enthalpy in an exothermic reaction is

1. positive


2. negative


3. constant


4. neutral

4. The first law of thermodynamics states that energy can not be

1. created only


2. destroyed only


3. converted


4. created and destroyed

5. Hess...

A kilogram of hydrogen is having more molecules.

Explanation:
For hydrogen that value is 1.008. For oxygen it’s 16.00. That means however many times you can divide the mass by its molar mass, So for example 1000g (1kg) / 1.008 is approximately992 moles of hydrogen. And 1000g/16.00 is 62.5 moles of Oxygen. Now to put it all together, one mole is equal to 6.02x10^23 molecules so obviously since there are more moles of hydrogen, you would have a significantly larger amount of hydrogen.