HGC 1201 ▬ GENERAL CHEMISTRY 2 ▬ Q3 - QUIZ3

HGC 1201 ▬ GENERAL CHEMISTRY 2 ▬ Q3 - QUIZ3

11th Grade

9 Qs

quiz-placeholder

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HGC 1201 ▬ GENERAL CHEMISTRY 2 ▬ Q3 - QUIZ3

HGC 1201 ▬ GENERAL CHEMISTRY 2 ▬ Q3 - QUIZ3

Assessment

Quiz

Chemistry

11th Grade

Medium

Created by

JiNN ...

Used 13+ times

FREE Resource

9 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

Which of the following is an exothermic reaction?

Sublimation of Naphthalene (C10H8)

Melting of Iron (F)

Vaporization of Methanol (CH3OHM

Combustion of Acetylene (C2H2)

2.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

Which of the following is defined as the "heat change that takes place when 1 mole of a compound is formed from its elements in their stable states at standard temperature and pressure"?

standard enthalpy of formation

standard enthalpy of hydration

standard enthalpy of atomization

standard enthalpy of combustion

3.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

The standard temperature and pressure is given at which of the following values?

25 degrees Celsius, 760 atm

25 degrees Celsius, 2 atm

25 degrees Celsius, 1 atm

1 degree Celsius, 25 atm

4.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

The change in enthalpy of reaction can be defined as ____.

ΔHproducts +ΔHreactants

ΔHproducts x ΔHreactants

ΔHreactants + ΔHproducts

ΔHproducts - ΔHreactants

5.

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

Which of the following thermochemical equation is an example that exhibits combustion?

2C3H8O + 9O2 → 6CO2 + 8H2O

C3H8O + H2O → CO2 + O2

C3H8O + NO2 → CO2 + N2O

C3H8O + CO2 → 2CO2 + H2O

6.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

A thermochemical equation shows that the resulting change in enthalpy is ΔH=-78kJ. What can we conclude from the value of the change in enthalpy?

the reaction is endothermic

the products are solid metallic oxides

the reactants are volatile

the reaction is exothermic

7.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

Combustion of hydrocarbons are extremely exothermic reactions. which of the following is a by-product of combustion of hydrocarbons

aqueous carboxylic acids

metallic oxides and water

carbon dioxide and water

aromatic phenols

8.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

This physical law states that: regardless of the multiple stages or steps of a reaction, the total enthalpy change for the reaction is the sum of all changes.

Law of conservation of energy

First law of thermodynamics

Hess's law

Calvin cycle

9.

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

Consider the following reactions below:

S(s) + 1/2 O2(g) → SO(g)              ΔH° = -140.0  kJ

SO2(g)  → SO(g) + 1/2 O2(g)         ΔH° = 295.5 kJ

Calculate ΔH° for the reaction: S(s)  + O2(g)  →  SO2(g)

435.5 kJ

155.5 kJ

-435.5 kJ

-155.5 kJ