AP chemistry Unit 6 Review

condensing

• exothermic

• endothermic

2NaCl + 35 kJ --> 2Na + Cl₂

• exothermic

• endothermic

Which substance would experience the biggest temperature change if each sample absorbed the same energy?

• 100 grams of water

• 25 grams of water

• 5 grams of water

• 2500 grams of water

which is endothermic?

• IMFs broken

• negative delta H

• products are lower energy than reactants

• temperature increases

Which is exothermic?

• temperature decreases

• heat is released by system

• liquid changes to gas

• products are at higher energy than reactants

This reaction is most likely

• endothermic.

• exothermic.

Refer the the following question:
2N₂ + 3H₂ --> 2NH₃ + 46 kJ
How much energy would be produced if only 1 mol of nitrogen was reacted?

• 92 kJ
• 0.143 kJ
• 23 kJ
• 15 kJ

The specific heat of liquid bromine is 0.2 J/gK. How much heat is required to raise the temperature of 100. grams of bromine from 15 K to 25 K?

• 30 J

• 500 J

• 20 J

• 200 J

How much heat is released when 36 grams of water is frozen at 0 C? The heat of solidification is 6.02 kJ/mol.

• 18 kJ

• 220 kJ

• 12 kJ

• 2 kJ

The enthalpy change for 2Na + Cl₂ --> 2NaCl is -35 kJ. What is the heat of reaction for 2NaCl --> 2Na + Cl₂

• - 35 kJ

• 35 kJ

• 70 kJ

• - 70 kJ