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在25℃下,向1kg溶剂A(H2O)和0.4mol溶质B形成的稀溶液中又加入1kg的纯溶剂,若溶液可视为理想稀溶液,求过程的ΔG.
在25℃下,向1kg溶剂A（H2O)和0.4mol溶质B形成的稀溶液中又加入1kg的纯溶剂,若溶液可视为理想稀溶液,求过程的ΔG.
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更多“在25℃下,向1kg溶剂A(H2O)和0.4mol溶质B形成…”相关的问题
已知水(H2O,I)在100℃的饱和蒸气压p=101.325kPa,在此温度.压力下水的摩尔蒸发焓
=40.668kJ·mol-1.求在100℃,101.325kPa下使1kg水蒸气全部凝结成液体水时的Q,W,ΔU和ΔH.设水蒸气适用理想气体状态方程.
A.0.334%
B.33.4%
C. 66.7%
D.50.0%
The prices (a transfer price) that Nail charges to the retail stores are set by head offi ce and have been the subject of some discussion. The current policy is for Nail to calculate the total variable cost of production and delivery and add 30% for profi t. Nail argues that all costs should be taken into consideration, offering to reduce the mark-up on costs to 10% in this case. The retail stores are unhappy with the current pricing policy arguing that it results in prices that are often higher than comparable products available on the market.
Nail has provided the following information to enable a price comparison to be made of the two possible pricing policies for one of its products.
Garden shears
Steel: the shears have 0？4kg of high quality steel in the fi nal product. The manufacturing process loses 5% of all steel put in. Steel costs $4,000 per tonne (1 tonne = 1,000kg)
Other materials: Other materials are bought in and have a list price of $3 per kg although Hammer secures a 10% volume discount on all purchases. The shears require 0？1kg of these materials.
The labour time to produce shears is 0？25 hours per unit and labour costs $10 per hour.
Variable overheads are absorbed at the rate of 150% of labour rates and fi xed overheads are 80% of the variable overheads.
Delivery is made by an outsourced distributor that charges Nail $0？50 per garden shear for delivery.
Required:
(a) Calculate the price that Nail would charge for the garden shears under the existing policy of variable cost plus 30%. (6 marks)
(b) Calculate the increase or decrease in price if the pricing policy switched to total cost plus 10%. (4 marks)
(c) Discuss whether or not including fi xed costs in a transfer price is a sensible policy. (4 marks)
(d) Discuss whether the retail stores should be allowed to buy in from outside suppliers if the prices are cheaper than those charged by Nail. (6 marks)
已知25℃甲酸甲酯的标准摩尔燃烧焓
为-979.5kJ·mol-1,甲酸(HCOOH,I)、甲醇(CH3OH,1)、水(H2O,I)及二氧化碳(CO2,g)的标准摩尔生成焓
分别为-424.72kJ·mol-1,-238.66kJ·mol-1,-285.83kJ·mol-1及-393.509kJ·mol-1.应用这些数据求25℃时下列反应的标准摩尔反应焓.
设圆的圆心在直线x+y+6=0上，并且它在x轴和y轴上截得的弦长都是4，则该圆的方程为（） (A)(x+3)2+(y+3)2=13 (B)(x+3)2+(y+3)2=25 (C)(x-3)2+(y-3)2=13 (D)(x-3)2+(y-3)2=25
滴定标准溶液在常温(15℃～25℃)下，保存时间一般不超过（）。
A.1个月
B.2个月
C.3个月
D.6个月
25℃时AgCl在纯水中的溶解度为1.34×10-5mol/L，则该温度下AgCl的Ksp值为()。
A.8.8×10-10
B.5.6×10-10
C.3.5×10-10
D.1.8×10-10
