Question

1. Mixing pure sodium metal with chlorine gas results in an explosion. 2 Na + Cl2 ---> 2 NaCl + 196 kcals How many moles of Na would be needed to produce 4,320 kcals?

2. In photosynthesis, plants absorb sunlight, water and CO2 to make glucose. The balanced equation is: 6 CO2 + 6 H2O + 678kcal ----> C6H1206 + 6 O2. How many kcals are necessary to make 1.689 moles of glucose?

3. Mixing pure sodium metal with chlorine gas results in an explosion. 2 Na + Cl2 ---> 2 NaCl + 196 kcals How many kcals would be released if 0.0191 moles of Na were introduced in a container with an excess of chlorine gas?

Answer 1

Solution - Ou 1. Given chemical Reaction:- 2Na + Cl2 + 2N9CI+ 196 kcals Arronding to chemical Reaction 2 mole of Ng would be needed to produce According to chemical React 196 kcal wodle be needed to produce So 1 mole of Ng woold be needed to o 196 kcal 2 mol - 98 kcal moi Soi moles of Na needed to product 4320 kce i => 4320 kcal -> 44.08 mole of Na 98 kcal/mol 44.08 mole of Nq needed Ange Qul 2 Given chemical Reachon:- 6002 +61,0 +678 kcal -- CH, 206+602 moles of cuilcoser C6H1206) = 1•689 mol to chemical Reaction 1 mol C6H12O6 Produce by 678 kcal So: 1.689 anal CóH1206 produce by 678 kcal x 11689 mol According to chemcow Neacion So oulose Energy needed to produce 1689 mol Glucose = 1145.142. k cow Anso von chemical Reaction - 2Na+ cl, >2NC) +196 kcau Qu3Given cherry.com Reaction - According to chemiced Reaction - 196 k Coud energy released by 2 mol of nig in toucuced When 1 mol Of No intooduced then energy released = 196 kcom - 2 mol 298 kcal/mol when b-0191 md of Na introduced then energy released :>) 98kead.x0.0191 mot not = 108718 kcou