Speelfie Hont Cupuelty Of H20 Is 4 18 J G C 1 How Many Joules Are Needed To Warm 25 5 Grams Of Water From 14 C To 22 1 (248.27 KiB) Viewed 50 times
Speelfie Hont Cupuelty Of H20 Is 4 18 J G C 1 How Many Joules Are Needed To Warm 25 5 Grams Of Water From 14 C To 22 2 (231.46 KiB) Viewed 50 times
(Speelfie Hont Cupuelty of H20 is 4.18 J/g °C) 1. How many joules are needed to warm 25.5 grams of water from 14°C to 22.5"C? 1906.02J Q= mc,AT Q = mc. Qm Q- CAT AT CAT 2. Calculate the number of joules released when 75.0 grams of water are cooled from 100.0°C to 27,5°C. Q = mCpAT Q = mc, Q = C,AT AT CAT 3 m 3. If 1.13 x 10' J of heat is added to a water sample and the temperature rises from $80"C to its boiling point, what mass of wnter is in the sample? 225.27g m = QC, m = 0 m = C,AT m = QC.AT AT CAT Q 1 4. What is the specific heat capacity of gold 240 x 10 J of heat is needed to wamm 2500 grams of gold from 25.0 °C to 100.0°C Cp = mQAT C, = QAT Cp=0 MAT cp = um QAT m 5. What is the temperature change ir 386 10 J is absorbed by 600 g or copper, which has a specific heat capacity of 0.385J8C < AT = Coma AT = 0 mc, AT = m QC, AT - QC.
Enthalpy change calculations For each reaction, use the enthalpy details found on the table of enthalpies for the compounds involved. (AHnx = AH, products AHP reactums) 1. 2C.H_(1) + 1502(g) → 12CO3(g) + 6H30(g) 3 2. 2HNO3(aq) + NO(g) → 3NO, (g) + H2O(1) -135.6K) per mol 3 3 3. CH2(g) + C H2(g) → 2CH.(g) . 1 1 4. PbOz(s) + CO(g) → PbO(s) + CO2(g) 5. Al(SO4)3(s) + 3H-0 (1) ► AHO) + 3H solad)
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