Chemical Thermodynamics-First Law of Thermodynamics (NEET Chemistry): Questions 21 - 23 of 23

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Question number: 21

» 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: 22

» 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: 23

» 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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