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3CHM11509 HIK and students (1)

# 3CHM11509 HIK and students (1) - CHM 11500-A Dr Hilkka...

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CHM 11500-A Dr. Hilkka Kenttämaa Lecture 3

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NEXT WEEK in CHM115 New OWL Assignment; Due on Friday February 6 th Lab: Reactions in Aqueous Solution (Chapter 1, Lab Manual) Prelab (Chapter 1, Lab Manual)

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Question #1 What is a unit of temperature? a. ampere (A) b. gram (g) c. joule (J) d. kelvin (K) e. mol (mol) f. second (s) c. joule (J)
Base Units (Fundamental Units) Any other physical quantity can be expressed as a combination of the fundamental quantities

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Any other physical quantity can be expressed as a combination of the fundamental quantities Pressure (Pa) = Force (N) Area (m 2 ) = Mass ( kg ) x Acceleration ( m/s 2 ) Area ( m 2 ) Pa = N m 2 = kg m x s 2 Energy unit: Joule (J) : 1 J = 1 kg ( m 2 /s 2 )
Question #2 Which is the largest unit of energy? a. J b. kJ c. mJ d. MJ e. nJ f. pJ c. mJ

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9 Question #3 Which is the correct way to express the indicated temperature? a. 0 o C b. +10 o C c. -10 o C d. -3 o C e. -3.3321410 o C f. -3.3 o C 0 10 -10 -20 Always use a reasonable number of significant figures !

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Question #4 Which has the greater kinetic energy? KE = 1/2 m v 2 mass velocity
11 Potential and Kinetic Energy Energy is stored in molecules. As stored energy it is potential energy. Some molecules store more than others.

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3CHM11509 HIK and students (1) - CHM 11500-A Dr Hilkka...

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