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Anna [14]
3 years ago
8

T/F according to the law of conservation of energy, when you use energy

Chemistry
1 answer:
Bond [772]3 years ago
5 0
I think the answer is false
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In an exothermic reaction, heat can be considered a __________.
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Answer is: product of reaction.
<span>There are two types of reaction: endothermic reaction (chemical reaction that absorbs more energy than it releases) and exothermic reaction (chemical reaction that releases more energy than it absorbs). 
</span><span>According to Le Chatelier's principle when the reaction is exothermic heat is included as a product.</span>
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Why do you think the astronomical unit is not used to measure distances on earth?
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What is the proper name of HF
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What type of reaction is P4 + 3O2 = 2P2O3
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3 years ago
Use bond energies to calculate δhrxn for the reaction. n2(g)+3cl2(g)→2ncl3(g)
Jobisdone [24]
ΔHrxn = ΣδΗ(bond breaking) - ΣδΗ(bond making)

Bond enthalpies,
N ≡ N ⇒ 945 kJ mol⁻¹
N - Cl ⇒ 192 kJ mol⁻¹
Cl - Cl⇒ 242 kJ mol⁻¹

According to the balanced equation,
ΣδΗ(bond breaking)  = N ≡ N x 1 + Cl - Cl x 3
                                  = 945 + 3(242)
                                  = 1671 kJ mol⁻¹
ΣδΗ(bond making)    = N - Cl x 3 x 2
                                 = 192 x 6
                                 = 1152 kJ mol⁻¹

δHrxn = ΣδΗ(bond breaking) - ΣδΗ(bond making)
          = 1671 kJ mol⁻¹ - 1152 kJ mol⁻¹
          = 519 kJ mol⁻¹
3 0
3 years ago
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