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How much heat is absorbed by 20 The specific heat of gold is 0.13 8 of gold when it is heated from 259C Jg"c? '358C?0.026J 7.36 _L0006}26 ]...

Question

How much heat is absorbed by 20 The specific heat of gold is 0.13 8 of gold when it is heated from 259C Jg"c? '358C?0.026J 7.36 _L0006}26 ]

How much heat is absorbed by 20 The specific heat of gold is 0.13 8 of gold when it is heated from 259C Jg"c? '358C? 0.026J 7.36 _ L0006} 26 ]



Answers

How much heat does 25 g of a metal give off as it cools from 100 ${ }^{\circ} \mathrm{C}$ to $20^{\circ} \mathrm{C}$ if $c=880 \mathrm{~J} / \mathrm{kg} \cdot{ }^{\circ} \mathrm{C}$. $\Delta Q=m c \Delta T=(0.025 \mathrm{~kg})\left(880 \mathrm{~J} / \mathrm{kg} \cdot{ }^{\circ} \mathrm{C}\right)\left(-80{ }^{\circ} \mathrm{C}\right)=-1.76 \mathrm{~kJ}$ or to two significant figures, $-1.8 \mathrm{~kJ}$.

In order to determine how much heat is absorbed, will need to calculate. Q, which will be a heat absorbed, is equal than the mass times he capacity Chinese. The change in temperature The mass of the boulder is 2.0 times. 10 to the 3 g are constant. Here for granted is given as 803 Jules per gram degrees Celsius, and our change in temperature will do. This in degrees Celsius is, uh, temperature final 29 degrees Celsius minus 10 degrees Celsius, and calculating this 23 significant figures, we get 30,500 jewels of energy that would be absorbed.

Hello Today we'll be talking about Chapter 15 Question 12 which asks us to consider a 90 graham metal of an unspecified element. So 90.0 grams metal and we have to determine the specific heat of this metal. And so we're told that when energy is added to when energy is put into the metal, so if Q is 25 0.6, Jules in the middle absorbs 25.6. Jules, the change in temperature is that the metal gets one 0.18 degrees Celsius warmer, so we need to solve for the specific heat. C p. Now we have an equation. The relates heat and temperature change. That equation is Q Thea Energy absorbed equals M times, C, p times, delta T the heat capacity, the mass of the object and the change in temperature. And in our case, we have the energy absorbed here. We have the mass given to us, and we also have the change in temperature measured for us. And so all we need to do is solve for the heat capacity are the specific heat. And so if we rearrange this equation, we can divide both signs by m Delta t to get See some p this three he capacity by itself. So that runs out to be Q over M. Delta T equals C P. And if we plug our numbers in, we get 25 0.6 Jules, divided by 90.0 grams of the metal times, 1.18 degrees Celsius. And so, if we look at our units, we see that are none of our units will cancel at all. And so our final answer is gonna have units of jewels per gram degree Celsius, which is correct for specific heat. And our final answer is zero 0.241 Jules her Graham degrees Celsius. And so now that we have our answer, we know exactly how much energy we need to apply in future to heat this amount of a metal to whatever temperature re so desire. Thank you.

This photo were given the amount of feet Which enters a certain piece of metal is equal to 2.48 kill a child which is equal to 2480 Jar. Which makes The temperature of the better it is by 25 years. And gets turning the pages 25 years in. To get in the first part of this question, we are asked to find heat capacity. Yes. As you know date heat capacity is equal to what did you get? They'll take. You do it by letter T. When the turkey is equal to 2480 job divided by 25° integrated. When we saw this, you get heat capacity of the substances. They could do 99.2. The tone where degree centigrade it. This is the answer. The first part of this question in the second part of this question, Yeah. 10 in temperature is $200 integrated. But we are asked to find the amount of it required to change the structure but continues to be good. So we should be called detectives. You got to hit capacity multiplied by delta T. The attack U. Is equal to hit capacity is is mhm At 9.2 jail fire degrees integrate multiply by 200%. So we saw this weekend. Thank you. He's got to 19.84 killer jOHn. Which is the answer to this question. Thank you for a studio. Yeah.

This is question 51 from Chapter 10 section board, and we have 0.13 jewels for Grandpa Associates of Gold. And we're gonna convert that to calories per grams. Time Celsius, say a point 13 Jules program Time Celsius. Now we get to do for this is make your conversions. So one calorie is equal to four 0.184 Druze, and this is gonna be equal to point 031 cows. Calories, program, time, Celsius.


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