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Problem

Suppose that 25 g of each substance is initially …

07:02

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Eugene S.

University of Minnesota - Twin Cities

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Problem 1 Problem 2 Problem 3 Problem 4 Problem 5 Problem 6 Problem 7 Problem 8 Problem 9 Problem 10 Problem 11 Problem 12 Problem 13 Problem 14 Problem 15 Problem 16 Problem 17 Problem 18 Problem 19 Problem 20 Problem 21 Problem 22 Problem 23 Problem 24 Problem 25 Problem 26 Problem 27 Problem 28 Problem 29 Problem 30 Problem 31 Problem 32 Problem 33 Problem 34 Problem 35 Problem 36 Problem 37 Problem 38 Problem 39 Problem 40 Problem 41 Problem 42 Problem 43 Problem 44 Problem 45 Problem 46 Problem 47 Problem 48 Problem 49 Problem 50 Problem 51 Problem 52 Problem 52 Problem 53 Problem 55 Problem 56 Problem 57 Problem 58 Problem 59 Problem 60 Problem 61 Problem 62 Problem 63 Problem 64 Problem 65 Problem 66 Problem 67 Problem 68 Problem 69 Problem 70 Problem 71 Problem 72 Problem 73 Problem 74 Problem 75 Problem 76 Problem 77 Problem 78 Problem 79 Problem 80 Problem 81 Problem 82 Problem 83 Problem 84 Problem 85 Problem 86 Problem 87 Problem 88 Problem 89 Problem 90 Problem 91 Problem 92 Problem 93 Problem 94 Problem 95 Problem 96 Problem 97 Problem 98 Problem 99 Problem 100 Problem 101 Problem 102 Problem 103 Problem 104 Problem 105 Problem 106 Problem 107 Problem 108 Problem 109 Problem 110 Problem 111 Problem 112 Problem 113 Problem 114 Problem 115 Problem 116 Problem 117 Problem 118 Problem 119 Problem 120 Problem 121 Problem 122 Problem 123 Problem 124 Problem 125 Problem 126 Problem 127 Problem 128 Problem 129 Problem 130 Problem 131 Problem 132 Problem 133 Problem 134 Problem 135 Problem 136 Problem 137 Problem 138 Problem 139 Problem 140 Problem 141 Problem 142 Problem 143 Problem 144 Problem 145 Problem 146 Problem 147 Problem 148

Problem 42 Easy Difficulty

How much heat is required to warm 1.50 kg of sand from 25.0 C to 100.0 C?

Answer

93900

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Video Transcript

So this question asks how much heat Q is required to heat one point five kilograms of sand from twenty five degrees Celsius to one hundred degrees Celsius, and so we can use the equation. Q Heat equals M, which is mass time CS, which is he capacity times Delta T. And so our CS in this case is for sand, which is zero point eight three five Jules per gram degrees Celsius. And then our delta T is one hundred minus twenty five since we have one hundred, which is our final temperature, and twenty five is our initial so finest final minus initial equals change. And so our change in temperature is seventy five degrees Celcius, and so are we want to convert our mass into Graham's so just multiplied by a thousand. And so now we just plug in these values so fifteen hundred grams times zero point eight three five jewels per gram, degrees Celsius times seventy five degrees Celsius and we get nine three, nine three seven point five jewels. And so to account for Sig Figs, we just around it to three sig figs and our final answer is nine three nine zero zero. Jules

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