▪ shed energy, release heat, temperature of the surroundings increases▪ entails bond development (for step change: gas → fluid → solid)▪ ΔH isnegative

Endothermic reactions

▪ gain/requires energy, absorbs heat, temperature of the next site decreases▪ involves breaking bonds (for phase change: heavy → fluid → gas)▪ ΔH ispositive

Analyzing process given:


Which one of the following processes is endothermic?

a. 2 H2 (g) + O2(g) → 2 H2O (g)

b. H2O (g) → H 2O (l)

c. CH4 (g) + 2 O2 (g) → CO2 (g) + 2 H2O (g)

d. H2O (s) → H2O (l)

e. 2 Al (s) + Fe2O3 (s) → Al2O3 (s) + 2 Fe (s)

Q.Which is a measure up of the sum of the kinetic and potential energies of each bit in the system?a) H, the enthalpyb) G, the Gibbs free energyc) E, ...

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Q.Complete the complying with sentences around endothermic and also exothermic changes.Exothermic changes: the device _ the surroundings. The heat _____ through the sur...
Q.During an energy exchange, a chemical system absorbs energy from that is surroundings. What is the sign of ΔEsys for this process? Explain.
Q.From a molecular viewpoint, where does the energy absorbed in one endothermic chemical reaction go?

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Based on our data, we think this problem is appropriate for Professor Santra's class at UCF.

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