Chemical Thermodynamics (NEET Chemistry): Questions 45 - 50 of 50

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Question number: 45

» Chemical Thermodynamics » First Law of Thermodynamics » Endothermic Reactions

MCQ▾

Question

When ammonium chloride is dissolved in water, the solution becomes cold, the change is?

Choices

Choice (4) Response
a.

Adiabatic

b.

Super cooling

c.

Exothermic

d.

Endothermic

Question number: 46

» Chemical Thermodynamics » First Law of Thermodynamics » Heat Capacity

MCQ▾

Question

What is the energy change of the system, if 400 calories of heat energy is absorbed to a

system and system does 250 calories of work on surroundings?

Choices

Choice (4) Response
a.

150cal

b.

-650cal

c.

-150 cal

d.

650 cal

Question number: 47

» Chemical Thermodynamics » Types of Processes » Isothermal

MCQ▾

Question

Calculate q for the reversible isothermal expansion of one mole of ideal gas at 127°C

From a volume of 10 dm3 to 20 dm3.

Choices

Choice (4) Response
a.

-2305.3J

b.

-2.305J

c.

2305.3J

d.

2.305J

Question number: 48

» Chemical Thermodynamics » Types of Processes » Adiabatic

MCQ▾

Question

For an adiabatic process, which of the following is correct?

Choices

Choice (4) Response
a.

∆ E = q

b.

q =+w

c.

∆ q = 0

d. P V = 0

Question number: 49

» Chemical Thermodynamics » First Law of Thermodynamics » Exothermic Reactions

MCQ▾

Question

Enthalpy of combustion of C 6 H 6 (l) - 3264.6 KJ/mol. The heat produced by burning 3.9 g of benzene is?

Choices

Choice (4) Response
a.

-326.4 KJ

b.

-32.64 KJ

c.

-163.23 KJ

d.

-3.264 KJ

Question number: 50

» Chemical Thermodynamics » First Law of Thermodynamics » Endothermic Reactions

MCQ▾

Question

In endothermic reactions, which of the following is correct?

Choices

Choice (4) Response
a.

Heat supplied to surroundings

b.

H R > H P

c.

∆ H =+ve

d.

∆ H =-ve

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