So we're giving information here about certain compound Maybelline. So C10 H eight and essentially it has an entropy of combustion of -5100. About 57 killer jewels promote And were given that we're going to use an initial mass of 0.0 1 5- zero g. Basically it changes the temperature a calorie meter By 0.21123 C. This is our first part. So remember that essentially for a cholera motor. Typically we define essentially a calorie emitter. We're not really interested in the mass of the calorie in there particularly. So we just define essentially a calorie miller constant or heat capacity basically for a calorie meter. Since basically the mass values already incorporated and then this is equivalent to the temperature change of the tower. So we're given information that the temperature changes 0.212 degrees Celsius. and one important point to no notice here is essentially since we're at constant pressure at constant pressure, normally delta H Is equivalent to delta U. Plus p delta v. Since we're at constant pressure, we can rewrite this as Q plus W plus p delta v. We know that work is to find this negative p delta V. So this crosses out. So at constant pressure only the entropy of combustion is equivalent to the heat transferred. And we're going to remember here, essentially we're gonna consider are calorie under as basically the surroundings per se. And then essentially the system itself is the content that's going to be combusted. So remember that essentially the queue of the system equals negative Q. Of the surroundings. So these are going to be important basically facts. So let's rewrite essentially the queue of the system is equivalent to negative 5557 kg per mole. But we only had a certain initial amount. But let's first write this in terms of surroundings And this is equivalent to 5157 kg per mole. But we only have this defined initial amount of are basically combustion compound. So we have to first consider that. So since our compound, let's rewrite at C10 a trade. So the queue of surroundings of 5,157 killer jewels promote. So let's remember that one mole of this compound we essentially only had. So one mole of this compound has how many grams. So let's first find that. So C 10 H. H. has a molar mass of about 128. So we had essentially 128 g For this. one more of compound. And in this case we only had, we need the grams and the moles cancel out to give us units basically. Uh we need units of energy in this case. So we only had 0.015-0 g in this case. So all our units cancel out. So this gives us confirmation. So we divide 50 5157 Divided by 128. Then multiply by 0.015- zero. And I'm just going to convert this into jewels for convenience. So this is equivalent to about 612 jewels. Which basically the calorie meter is the surrounding. So we can this is equivalent to the calories in their constant or the heat capacity of the calorie meter times the change in temperature. So in this case we can see that the change of temperature is 0.212°C, 612 divided by this. We can get a calorie meter constant is equivalent to about 2900 jules times inverse degrees Celsius. And this is our answer for part one. For the second part essentially we have basically information that the initial temperature of a calorie meter from part A. So we still are going to use the same, essentially calorie meter constant here Of 2900 was 22.102 degrees Celsius. What? We're deciding to use a different compound here, We're going to use octane. So the mass basically a 0.1040 g and were given that the heat combustion Is negative. 5,451 .4 kg promote. So once again we're going to have to do a conversion and we're since we're just going to assume that this is constant pressure again, So this is equivalent to queue of the system. So the key of the surroundings is the negative of that. So it's 5,457.4 killing tools promote. Now we have to do our conversion times one more Family g do we have? So eight times 12, 18. So that's 114 g per mole. And we have 0.1040 g. So, multiple, multiplying all this out, We can find that essentially Q. of the surroundings is about 5900 Uh 5980 in terms of jewels. And this is equivalent to a certain calorie meter constant that we defined before its 2900. So we divide this out and we find that the temperature change Is equivalent to one point about 1.72°C.. And now we can plug this essentially which is equivalent to final temperature minus initial. So our final temperature is equivalent to 1.72 Plus 22.10 to this gives us about 23.8-2 to create Celsius, and this is our final answer.