Quarter 1 Chemistry Review

Fill in the blank: During the phase change from H2O(ℓ) to H2O(s), the process is ____.

• Endothermic

• Exothermic

• Isothermal

• Adiabatic

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Fill in the blank: The heating curve of H2O shows that at point D, the substance is ____.

• Solid

• Liquid

• Gas

• Plasma

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Fill in the blank: The process of H2O(s) turning into H2O(g) is known as ____. A) Sublimation B) Deposition C) Melting D) Freezing

• Sublimation

• Deposition

• Melting

• Freezing

Tags

NGSS.MS-PS1-4

How much energy is required to vaporize 10.00 grams of water at its boiling point?

• 2.26 kJ

• 3.34 kJ

• 4.2 kJ

• 22.6 kJ

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Which two atoms are isotopes of the same element?

• A) A and D

• B) A and Z

• C) X and D

• D) X and Z

The compound whose molecules have the highest average kinetic energy is

• NO(g) at 25°C

• N2O(g) at 15°C

• NO2(g) at 30°C

• N2O3(g) at 20°C

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Fill in the blank: The formula that represents a homogeneous mixture is ____. A) CO2(aq) B) CO2(s) C) CO2(l) D) CO2(g)

• CO2(aq)

• CO2(s)

• CO2(l)

• CO2(g)

Which physical property makes it possible to separate the components of crude oil by means of distillation?

• melting point

• conductivity

• solubility

• boiling point

What is the total number of Joules of heat that must be absorbed to change the temperature of 100. grams of H2O from 25.0°C to 30.0°C?

• 420.

• 2100

• 10500

• 13000

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

In a laboratory experiment, the melting point of compound A was determined to be 82.6°C. If the accepted value is 80.5°C, what is the percent error in this determination? (Show proper significant figures)

• A) 2.5

• B) 2.54

• C) 2.6

• D) 2.71