Concept explainers
Interpretation:
The given process namely ice melts to liquid water and the liquid water freezes to ice has to be identified whether they are exothermic or endothermic reactions.
Concept Introduction:
Energy: It is the capacity or ability to do work. Joule (J) is the SI unit of energy.
Exothermic reaction: Exothermic reactions are those in which evolution of heat takes place during chemical reaction.
Endothermic reaction: Endothermic reactions are
System is nothing but our focus of study, anything other from system is called surroundings.
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Chapter 4 Solutions
OWLv2 for Moore/Stanitski's Chemistry: The Molecular Science, 5th Edition, [Instant Access], 1 term (6 months)
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- The table shows the tensile stress-strain values obtained for various hypothetical metals. Based on this, indicate which is the most brittle and which is the most tough (or most resistant). Breaking strength Elastic modulus Material Yield strength Tensile strength Breaking strain A (MPa) 415 (MPa) (MPa) (GPa) 550 0.15 500 310 B 700 850 0.15 720 300 C Non-effluence fracture 650 350arrow_forwardPlease correct answer and don't used hand raitingarrow_forwardMaterials. The following terms are synonyms: tension, effort and stress.arrow_forward
- Please correct answer and don't used hand raitingarrow_forwardPlease correct answer and don't used hand raitingarrow_forwardThe table shows the tensile stress-strain values obtained for various hypothetical metals. Based on this, indicate which material will be the most ductile and which the most brittle. Material Yield strength Tensile strength Breaking strain Breaking strength Elastic modulus (MPa) (MPa) (MPa) (GPa) A 310 340 0.23 265 210 B 100 120 0.40 105 150 с 415 550 0.15 500 310 D 700 850 0.14 720 210 E - Non-effluence fracture 650 350arrow_forward
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