Thermochemistry Review

Convert 475 J to cal

• 113.53 cal

• 0.475 cal

• 56.27 cal

• 475000 cal

Convert 270 cal to J

• 1129.68 J

• 270000 J

• 0.270 J

• 5874.3 J

Convert 1420 kJ to cal

• 339388 cal

• 2236 cal

• 14.20 cal

• 9861 cal

Convert 10.1 kcal to J

• 42258.4 J

• 12411 J

• 10100 J

• 785.35 J

Tags

NGSS.HS-PS3-4

Tags

NGSS.HS-PS3-4

NGSS.HS-PS3-1

• 2272.7 g

• 65987 g

• 36.17 g

• 1123.12 g

Tags

NGSS.HS-PS3-4

• 12.49 ^oC

• 24.36 ^oC

• 55.7 ^oC

• 48.33 ^oC

Tags

NGSS.HS-PS3-4

NGSS.HS-PS3-1

Categorize the following scenarios as either exothermic or endothermic.

Groups:

(a) Exothermic

,

(b) Endothermic

• Burning a match.

• 1. An ice cube melts after being left out on the table. 

• Morning dew forming on grass and plants.

• The human body uses the energy provided from food digestion.

• Making ice cubes.

• Plants making sugar through photosynthesis

• A puddle of water evaporates.

• Cooking an egg in a frying pan.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

How many moles of water are produced from the following reaction, when -275 kJ of energy is given off?              

4 NH₃ + 3  O₂  → 2  N₂ + 6  H₂O        ΔH = -1530 kJ

• 1.07 mol

• 0.59 mol

• 12.44 mol

• 6.14 mol

Tags

NGSS.HS-PS1-4