Chem 30 Day 2 (11.1, 11.3)

Are the following Endothermic or Exothermic?

Groups:

(a) Endothermic

,

(b) Exothermic

• cellular respiration

• combustion

• nuclear fusion

• freezing of water
• photosynthesis

• cold packs

• boiling water

• baking bread

CO_2(g) and H₂O_(l) are the products of

• photosynthesis

• cellular respiration

• hydrocarbon combustion

• cellular respiration and hydrocarbon combustion

All energy on Earth originates from

• plants

• photosynthesis

• the sun

• crude oil

Math the Laws

• Mass before = mass after reaction

• 2nd Law of Thermodynamics

• Energy cannot be created or destroyed.

• 1st Law of Thermo Dynamics

• Thermal energy moves from hot to cold

• Law of Conservation of Mass

Match the Terms

• Transfer of energy

• Thermal Energy

• Total kinetic energy of particles

• Temperature

• Average kinetic energy of particles

• Heat

Match The System Types

• Neither energy nor matter exchanges

• Isolated System

• Both energy and matter exchanges

• Open System

• Matter cannot exchange, but energy can.

• Closed System

How many significant digits in the answer: 1.535 x 0.002

• 1

• 2

• 3

• 4

How Many Significant Digits in the answer: 1.535 + 0.002

• 1

• 2

• 3

• 4

Match the Units

• Joules

• specific heat capacity

• moles

• energy

• J/g^oC

• amount

• kg

• mass

How much energy is lost when 500. mL of water cools from 20.0^oC to 5^oC? (SHC = 4.19 J/g^oC)

_____ kJ (number only, include significant digits only)