Answer

A sample of benzene, $\mathrmC_6 \mathrmH_6$, weighing $3.51 \mathrm~g$ was melted in an excess of oxygen in a bomb calorimeter. The temperature that the calorimeter climbed from $25.00^\circ \mathrmC$ come $37.18^\circ \mathrmC$. If the warmth capacity that the calorimeter and also contents to be $12.05 \mathrm~kJ / ^\circ \mathrmC$, what is the value of $q$ for burning $1.25 \mathrm~mol$ that benzene at consistent volume and also $25.00^\circ \mathrmC ?$ The reaction is$$\mathrmC_6 \mathrmH_6(l)+\frac152 \mathrmO_2(g) \longrightarrow 6 \mathrmCO_2(g)+3 \mathrmH_2 \mathrmO(l)$$




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Video Transcript

So let's begin by transforming our grams the benzene to malls. For this reason one shopping mall is 78.12 g. That gives us .0449 moles are changing temperature is constantly final minus early stage 37.18 -25 offers us 12.18°C. R. C. Of our calorie emitter Is 12.05 killer jewels for levels Celsius. So our Q. Is negative. Check out cal time delta T. -12.05 killed jules per degree Celsius time 12.18°C. Therefore that offers us an adverse one 47 killer jewels because that that countless moles. Therefore that gives us our delta H. Is an adverse 32 69 killer jewels every mole. However we desire to know how plenty of killer jewels will get if we use 1.25 moles. So that's gonna be an unfavorable for 0.9 times 10 come the third killer jewels.


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Intro come Chem - arrival

Chemistry is the scientific research of matter, particularly its chemical reactions, but likewise its composition, structure and also properties. Chemistry faces atoms and also their interactions with various other atoms, and specifically with the properties of chemistry bonds. Chemistry additionally involves understanding the properties and also interactions of separation, personal, instance atoms and also molecules for usage in larger-scale applications.


Classification and also Properties of issue

In chemistry and also physics, issue is any type of substance that has actually mass and takes up space by having actually volume. All day-to-day objects that can be touched are ultimately composed of atoms, which are comprised of interacting subatomic particles, and in everyday and scientific usage, "matter" generally includes atoms and also anything consisted of of them, and any particles and objects that act together if they have both remainder mass and also volume. However it go not incorporate massless particles such together photons, or other power phenomena or tide such as light or sound. Matter exists in various states (known as phases) that are defined by assorted physical properties, such as state of matter, phase, shape, and also density. The Standard model of bit physics and the general theory the relativity describe basic particles and also the basic forces acting between them that manage the structure and also dynamics of matter.