Calculate Ea of the reaction in kJ/mol with the following data. Don't enter the unit in the answer. k(s¯¹) 2.0x10-5 7.3x10-5 2.7x10-4 9.1x10-4 T(°C) 20 30 40 50

true of false

The thermite reaction, Fe2O3(s) + 2 Al(s) ---->2 Fe(s) +Al2O3(s), ΔH° = -851.5 kJ/mol, is one of the most exothermicreactions known. Because the heat released issufficient to melt the iron product, the reaction is used toweld metal under the ocean. How much heat is released permole of Al2O3 produced? How does this amount of thermalenergy compare with the energy released when 2 mol ofprotons and 2 mol of neutrons combine to form 1 mol ofalpha particles?

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A chemist measures the energy change AH during the following reaction: 2 NH,(9) - N,(9)+3H,(9) AH = 160. kJ Use the information to answer the following questions. O endothermic. This reaction is... alo O exothermic. Suppose 46.5 g of NH, react. O Yes, absorbed. O Yes, released. Will any heat be released or absorbed? O No. If you said heat will be released or absorbed in the second part of this question, calculate how much heat will be released or absorbed. Be sure your answer has the correct number of significant digits.

-1. How much heat is released (in kJ) from 253 g of silver when it cools from 85 °C to 26 °C? The heat capacity of silver is 0.235 Jg C-¹. Hint: "heat released" means you should get a negative change in heat. But enter a positive number for this question.

The reaction 4AI (s) + 302 (g)→ 2 Al203 (s) AH° = -3351 kJ is and therefore heat is by the reaction. thermoneutral, neither released nor absorbed O endothermic, absorbed exothermic, released exothermic, absorbed endothermic, released

A chemist measures the energy change AH during the following reaction: 2 HgO(s) → 2 Hg(1)+O,(g) AH=182. kJ Use the information to answer the following questions. endothermic. This reaction is... x10 exothermic. Yes, absorbed. Suppose 56.6g of HgO react. Yes, released. Will any heat be released or absorbed? No. If you said heat will be released or absorbed in the second part of this question, calculate how much heat will be released or absorbed. kJ Round your answer to 3 significant digits.

Consider the reaction   2H2+O2⟶2H2O        Δ?rxn=−484 kJ   Which answer best describes the transfer of heat that occurs when 1.70 mol H21.70 mol H2 reacts? A.) 823 kJ absorbed B.) 484 kJ released C.) 484 kJ absorbed D.) 823 kJ released E.) 411 kJ absorbed F.) 411 kJ released

Calculate ΔΗ°rxn for the combustion of carbon monoxide, producing CO2 in KJ.  2CO(g)+O2(g)-->2CO2(g)