Change in Heat

How many Joules of energy are required to make 100.0 grams of ice at 0.00 C completely melt?

• 601 J

• 33.4 J

• 33,400 J

• 2,000,000 J

How many Joules of energy are required to change 10.0 grams of ice at -2.00 C to water at 20.00 C?

• 440 J
• 880 J
• 3,340 J

• 66,000 J

Which two phases changes absorb energy (heat enters)?

• Freezing, Melting

• Condensation, Evaporation

• Freezing, Condensation

• Melting, Evaporation

Which two phases changes take away energy (heat exits)?

• Freezing, Melting

• Condensation, Evaporation

• Freezing, Condensation

• Melting, Evaporation

How many Joules of energy are required to make 50.0 grams of ice at 0 ^οC completely melt?

• 334 J

• 0 J

• 33,400 J

• 16,700 J

How much heat is needed to heat 10.00g of water from -2.00^oC to 104.0^oC in kJ?

ΔH_fus= 6.01 kJ/mol

ΔH_vap= 40.7 kJ/mol

c_ice= 2.01 J/g^oC

c_water= 4.184 J/g^oC

c_steam= 2.03 J/g^oC

Mathematical Equivalence

ON