Four objects, each weighing 10.0g. Initially at 10 degree C each absorbed 8.32 J

Question

Four objects, each weighing 10.0g. Initially at 10 degree C each absorbed 8.32 J of heat and experienced a temperature increase to the final temperatures given in a-d. Of the choices below for the final temperatures of the objects, which one would indicate the object with the greatest specific heat capacity? a. 36 degree C. b. 45 degree C. c. 79 degree C. d. 91 degree C. The specific heat capacity of solid copper metal is 0.385 J/g-K. How many joules of he are needed to raise the temperature of a 1.55 g block of copper from 33.0 degree to 77.5 degree C a. 1.79 times 10^5 b. 26.6 c. 2.66 times 10^4 d. 5.58 times 10^4 e. 0.00558 Substance Delta H degree If (g) -95 IF_5 (g) -840 IF_7 (g) -941 What is the value of Delta H degree for the following reaction? IF_7 (g) + I_2 (g) rightarrow IF_5 (g) + 2 IF (g) Calculate the Delta H degree for the following reaction: NH_3 (g) + 2O_2 (g) rightarrow HNO_3 (aq) + H_2 O(l) Use this information to help you: substance delta H_f degree H_2 O (l) -286 kJ NO (g) 90 kJ NO_2 (g) 24 kJ HNO_3 (aq) -207 kJ NH_3 (g) -46 kJ a. 654 kJ b. 33 kJ c. -33 kJ d. -447 kJ e. -654 kJ

Explanation / Answer

14)
Q = m*C(Tf-Ti)
Tf = (Q/mc) + Ti
for greatest heat capacity, Q/mc will be least and hence Tf will be least

So the correct option is the one having minimum possible value
Answer: a

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