Results for "exothermic"

C5 - Exothermic And Endothermic Reactions

C5.1 Exothermic and endothermic reactions

Exothermic and Endothermic reactions

Science - Unit 4 - Exothermic And Endothermic Reactions

AP Chemistry Unit 6 Energy Changes - Endothermic and Exothermic Processes

exothermic and endothermic reactions

Chemical Energetics – Endothermic & Exothermic Reactions

Thermochemistry – Endothermic and Exothermic Reactions

AQA GCSE Chemistry Paper 1

exothermic vs. endothermic

Exothermic & Endothermic Reactions and Patterns of Reactivity

Exothermic/endo (ch6)

4.5.1 Exothermic and Endothermic Reactions

exothermic and endothermic reactions

Exothermic and Endothermic Reactions

KS3 Endothermic and Exothermic reactions chemestry

endo and exothermic

endothermic and exothermic

Exothermic and Endothermic Reactions Review

Part II. Multiple choice, continued (3 points each). Name:__________________ Please circle your answer. There is only one correct answer to each question. 22. ∆E for a system that releases 12.4 J of heat and does 4.2 J of work on the surroundings is ____________ J. A) 16.6 B) 12.4 C) –8.2 D) –16.6 23. ∆H for an endothermic process is _________ while ∆H for an exothermic process is __________. A) zero, positive B) positive, negative C) negative, zero D) negative, positive 24. The value of ∆H˚ for the reaction below is –283 kJ. Calculate the heat (kJ) released to the surroundings when 12.0 g of CO reacts completely. CO (g) + O2 (g) à CO2 (g) A) 121 B) 660 C) 283 D) 212 25. Given the following reactions N2 (g) + 2O2 (g) à 2NO2 (g) ∆H = 66.4 kJ 2NO (g) + O2 (g) à 2NO2 (g) ∆H = -114.2 kJ the enthalpy of the reaction of nitrogen to produce nitric oxide N2 (g) + O2 (g) à 2NO (g) is __________ kJ. A) 180.6 B) –47.8 C) 47.8 D) –180.6 26. Given the data in the table below, ∆H˚ for the reaction 2CO (g) + O2 (g) à 2CO2 (g) is __________ kJ. Substance ∆Hf˚ (kJ/mol) CO (g) -110.5 CO2 (g) -393.5 CaCO3 (s) -1207.1 A) –677.0 B) 283.3 C) –283.0 D) –566.0