Endo/Exothermic
Endothermic or Exothermic?
1600kJ + 6CO2(g) + H2O(l) = C6H12O6(aq) + 6O2(g
Endothermic
2 Ag + Cu(NO3)2 + 146.39 kJ → 2 AgNO3 + Cu
If 8.37 kJ of heat is absorbed in this reaction, how many moles of AgNO3 will be produced
0.114 moles AgNO3
Silicon-30 decays into what element and a beta particle.
Phosphorus-30
What is it called when a neutron splits a nucleus into two smaller nuclei?
Fission
Krypton-94 decays to produce Rubidium-94 and an unknown particle.
beta
Which of the following is(are) NOT an exothermic rxn
? hands getting cold, lighting a match, rusting, fireworks exploding, making ice cubes, water evaporating, condensation
water evaporating
3 O2 + 284 kJ → 2 O3
If 173.38 grams of O3 are produced, how many kJ of heat will be absorbed or released?
+512.94 kJ
An unstable isotope undergoes decay to produce Tin-122 and a alpha particle.
What was the original isotope?
Tellurium-126
Where does fusion occur naturally?
Sun
Gallium-70 decays to produce Copper-66 and an unknown particle.
alpha
Endothermic or Exothermic?
C6H12O6 + O2 → CO2 + H2O + 3600kJ
Exothermic
Ca + 2 H2O → Ca(OH)2 + H2 + 431.15 kJ
If 1.4557 moles of H2O are reacted, how many kJ of heat will be absorbed or released?
-313.81 kJ
Silver-114 decays into an unknown particle and a beta particle.
What is the atomic number of the element after beta decay?
48
What places on earth use fission to produce energy?
nuclear power plants
______ decay produces an unknown element and Helium-4.
alpha
Which of the following is(are) NOT an endothermic rxn
? photosynthesis, instant cold pack, cooking an egg, making ice cubes, water evaporating, -3267 kJ
making ice cubes, -3267 kJ
2 P + 3 Cl2 → 2 PCl3 + 576 kJ
If 84.16 grams of PCl3 are produced, how many kJ of heat will be absorbed or released?
-176.5 kJ
Tungsten-190 decays into an unknown particle and an alpha particle.
What is the atomic mass of the new element?
186
What do fission and fusion have in common?
they produce energy
______ decay produces an unknown element and e-0.
beta
What happens to the surrounding temperature in an exothermic reaction?
increases
2 C + 2 H2 + O2 → CH3COOH + 484.13 kJ
If 8.84 kJ of heat is released in this reaction, how many grams of H2 were reacted?
0.0736 grams H2
Palladium-113 undergoes alpha decay. What are the two products?
10944 Ru + 42He
_________ requires breaking nuclear forces that hold the nucleus together.
_________produces harmful radioactive by-products. _________ requires breaking the repelling comb forces of charged protons.
Fission, Fission, Fusion
When molar mass decreases by 4 it is ______ decay. When molar mass stays the same it is ______ decay.
alpha, beta