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Calcium hydride, CaH2, reacts with water to form hydrogen gas: CaH2(s)+2H2O(l)→Ca(OH)2(aq)+2H2(g) This reaction is sometimes used to...

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Chemistry

Calcium hydride, CaH2, reacts with water to form hydrogen gas:CaH2(s)+2H2O(l)→Ca(OH)2(aq)+2H2(g) This reaction is sometimes usedto inflate life rafts, weather balloons, and the like, where asimple, compact means of generating H2 is desired.

Part A

How many grams of CaH2 are needed to generate 146 L of H2 gas ifthe pressure of H2 is 824 torr at 22 ∘C?

The metabolic oxidation of glucose, C6H12O6, in our bodiesproduces CO2, which is expelled from our lungs as a gas:C6H12O6(aq)+6O2(g)→6CO2(g)+6H2O(l)

Part A

Calculate the volume of dry CO2 produced at body temperature (37∘C) and 0.990 atm when 23.5 g of glucose is consumed in thisreaction

Part B

Calculate the volume of oxygen you would need, at 1.00 atm and298 K, to completely oxidize 53 g of glucose.

Answer & Explanation Solved by verified expert
3.9 Ratings (405 Votes)
Answer Part A Given volume of H2 gas 146 L pressure P 824 torr T 22 273 295 K Reaction CaH2s2H2Ol CaOH2aq2H2g Calculation of moles of H2 using Ideal gas law Convert the P torr to atm We know 760 torr 1 atm So 824 torr 108 atm We know Ideal gas law PV nRT So n PV RT 108 atm 146 L    See Answer
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