Physics

Physics, 30.08.2019 21:40, jaanne

This equation indicates that the reaction gives off heat. what is this type of reaction called?
c3h8 +? o2 → 3co2 + 4h2o + heat
a.
synthesis reaction
b.
decomposition reaction
c.
endothermic reaction
d.
exothermic reaction

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Chemistry, 27.06.2019 01:30, kkeith121p6ujlt

What is the chemical equation for the burning of propane if all the products and reactants are in the gas phase? 4h2o(g) + 3co2(g) + 5o2(g) → c3h8(g)c3h8(g) + 5o2(g) → 3co2(g) + 4h2o(g)c3h8(g) + o10(g) → 3co2(g) + 4h2o(l)4h2o(l) + 3co2(g) → c3h8(g) + 5o2(g)answer - b - c3h8(g) + 5o2(g) → 3co2(g) + 4h2o(g)

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Chemistry, 29.08.2019 10:10, Bryson2148

Check my answers ? 1. which of the following is a correctly written thermochemical equation? nh4cl nh4+ + cl 2c8h18 + 25o2 16co2 + 18h2o, h = 5,471 kj/mol fe (s) + o2 (g) fe2o3 (s), h = 3,926 kj --> c3h8 (g) + 5o2 (g) 3co2 (g) + 4h2o (l), h = 2,220 kj/mol 2. how does a phase change affect a thermochemical equation? it alters the moles of reactants. --> it can affect the (delta) h value. it alters the products. it affects the balance of the equation. 3. for the reaction ch4 (g) + 2o2 (g) co2 (g) + 2h2o (l), h = 890 kj, what will be the change in enthalpy when 3 moles of methane react in excess oxygen? 890 kj --> 2.67 × 103 kj +890 kj +2.67 × 103 kj 4. in which of the following thermochemical equations would the h be considered a heat of solution? nh4cl (s) nh4+ (aq) + cl (aq), h = + 14.8 kj/mol 2c8h18 (l) + 25o2 (g) 16co2 (g) + 18h2o (l), h = 5,471 kj/mol --> 4fe (s) + 3o2 (g) 2fe2o3 (s), h = 3,926 kj c3h8 (g) + 5o2 (g) 3co2 (g) + 4h2o (l), h = 2,220 kj/mol 5. for the following reaction at stp, how much heat will be required to produce 63 l of no? (at stp, one mole of any gas occupies 22.4 l.) n2 (g) + o2 (g) 2no (g), h = 180.5 kj +63 kj +127 kj --> +254 kj +508 kj

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Chemistry, 30.09.2019 13:00, busra09

Propane burns in oxygen to produce carbon dioxide and steam. which of the chemical equations matches the reaction above? a. c3h8 + 5o2 3co2 + 4h2o b. c3h8 + 4o2 2co2 + 4h2o c. c3h8 + 6o2 2co2 + 8h2o d. c3h8 + 6o2 3co2 + 6h2o

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This equation indicates that the reaction gives off heat. what is this type of reaction called?

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