34. Calculate ?E for each of the following. a. q = -47 kJ, w = +88 kJ b. q = +82 kJ, w = -47 kJ c. q = +47 kJ, w = 0 d. In which of these cases do the surroundings do work on the system?
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ΔE = q + w = -47 kJ + 88 kJ = 41 kJ b. ΔE = q + w = 82 kJ - 47 kJ = 35 kJ Show more…
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34. Calculate ΔE for each of the following: a. q = -47 kJ, w = +88 kJ b. q = +82 kJ, w = -47 kJ c. q = +47 kJ, w = 0 d. In which of these cases do the surroundings do work on the system?
Mahendra R.
A: Calculate ΔE, if q = 0.769 kJ and w = -840 J. B: Calculate ΔE, if a system releases 66.4 kJ of heat to its surroundings while the surroundings do 41.0 kJ of work on the system. C: Calculate ΔE, if the system absorbs 7.29 kJ of heat from the surroundings and no work is done.
Oluwapelumi K.
Calculate $\Delta E$ and determine whether the process is endothermic or exothermic for the following cases: (a) $q=0.763 \mathrm{~kJ}$ and $w=-840 \mathrm{~J} ;(\mathbf{b})$ a system releases $66.1 \mathrm{~kJ}$ of heat to its surroundings while the surroundings do $44.0 \mathrm{~kJ}$ of work on the system; (c) the system absorbs $7.25 \mathrm{~kJ}$ of heat from the surroundings while its volume remains constant (assume that only $P-V$ work can be done).
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